Laptop or Desktop Computer?

The Price Difference
You might wonder why laptops cost more than desktop computers with comparable features and power. That is largely because it is more expensive to manufacture laptops and their parts. For portable computer components, factors such as compactness, the amount of heat they generate, their weight, and power consumption are more important than they are for desktops. Those factors add to their manufacturing costs.

Space Requirements
While laptops are certainly compact, a desktop computer with a flat panel monitor can take up almost as little space. While called a "desktop" computer, the computer itself is most often kept on the floor. That leaves just the monitor, keyboard and mouse on the desk, which is really very similar in footprint to a notebook computer.

A great way to further reduce the space taken up on the desktop computer is get a keyboard drawer to hold the keyboard and mouse. That way, they slide out of the way under the top of the desk when they aren't needed.

Be Mindful of Ergonomics
Ergonomics is the science of designing and arranging things so that people can interact with them more comfortably and safely. The basic ergonomic principals for computer use tell us that, 1) the keyboard should be as close to your lap level as possible (assuming you touch-type), 2) the monitor should be about arm's length in front of you, and 3) the top of the monitor should be at about your eye level. Try achieving that with a laptop computer! Two words: im-possible.

It is obvious then, that a desktop computer is much better ergonomically than a laptop is. For prolonged use, especially, you're much better off with a desktop computer.

And Don't Forget Usability
Another aspect of ergonomics is usability. Because of size constraints, laptops also are lower on the usability scale than desktop PCs are. For one thing, laptop keyboards lack the separate groupings of the different sets of keys with space between them. For another, there are fewer keys on a laptop's keyboard, so some of them have to perform double duty. On a standard keyboard, you don't have to deal with that.

Screen Resolution
Computer monitors -- the bulky ones, anyway -- can be set at different resolutions. In other words, you can change the fineness of the image on the screen. The range is typically 640x480 -- that is 640 pixel across and 480 pixels up and down -- to 800x600, 1024x768, or even higher. At 640x480, the icons and such appear quite large; at 1024x768, they are substantially smaller. The most common resolutions today for desktop computers are 800x600 and 1024x768.

Essential Steps to Protect Your Computer On the Internet For Free

Step #1: Patch the operating system.

The first thing I did was update his Windows 98 to the latest available Windows updates for Windows 98.

Open Microsoft Windows Update page at
http://windowsupdate.microsoft.com/
Scan the PC to find out what critical updates and security fixes are missing.
Select, download, and install a selection of updates, especially any Critical Updates.

Restart the PC after finished.

When you open the Microsoft Windows Update page, click the "Scan for updates" link. The page will suggest what updates are needed based on your Windows version. You should install all Critical Updates suggested by Microsoft.

It took me about one and half hour to complete the above steps.

Step #2: Download, install, and run Spybot to get rid of all spyware.

http://www.safer-networking.org/index.php?page=download

Spybot-S&D is a free anti-spyware software to detect any spyware installed on your PC.

Spyware is any software that is installed on your PC and tracks your online behavior without your knowledge or consent. Spyware generally can

Track what web pages you are visiting and send these information to advertising companies. This kind of spyware is commonly called adware.

Track and record your computer activities such as what keys you hit. This is generally called Trojans.

Change your web browser's home page.

And more...


After installed Spybot, I immediately scanned my friend's computer and found 166 problems. The first run killed nearly all of them except some memory residents that had to be killed after a reboot.


Step #3: Download and install Kerio Personal Firewall (KPF).


http://www.kerio.com/us/kpf_download.html


Kerio Personal Firewall limited free edition is for home users. After installation, KPF works as the full edition for 30 days, after which it becomes the limited free edition.


You may also try the free ZoneAlarm firewall. Be aware that ZoneAlarm free edition uses a lot of computer memory.


The following is the free ZoneAlarm firewall download link. You hardly can find this download link on ZoneAlarm site because they want you to buy the Pro version which is a much better choice.


http://www.zonealarm.com/store/content/company/products/znalm/freeDownload.jsp


Step #4: Download AVG anti-virus software


http://www.grisoft.com/us/us_dwnl_free.php


Because my friend has McAfee antivirus installed but has not been updated for about 4years. I downloaded AVG Free Edition antivirus software and let him to consider if he wanted to pay and update his McAfee or use the freebie. Running two antivirus software on the same computer can cause conflicts.


Step #5: Install password management software - RoboForm free edition.


http://www.roboform.com/?affid=siter


RoboForm is a password management software with Artificial Intelligence built in that can automatically fill online forms for you. It has been featured on The Wall Street Journal, CNN, The New York Times, Financial Times, PC Magazine, etc.


Nowadays we all have many usernames and passwords to use on the internet. Some spywares record your keystrokes and send them to the hackers. It has been reported many times that people lost all their money in online bank account or internet payment system account.


One of RoboForm key features is designed to combat this kind of key logger hacking. RoboForm can



AutoSave passwords in browser.

AutoFill passwords to login form.

Click Login button for you.

Fill personal info into online forms.

Save offline passwords & notes.

Generate Secure Random Passwords.

Encrypt passwords and personal info using 3-DES.

All personal info is stored on your computer only.

Put passwords on USB KeyChain for extra security.

Sync your passwords and safenotes to a Palm.

Backup & Restore, Print your passwords.

More features: drill down for more.


RoboForm works best with IE 5.0 and above. IE6 is the recommended browser to use with Artificial Intelligence RoboForm.


Note: free eidition comes with some limitations.


Step #6: Apply additional security measures.


More security measures and resources:

Read Web Security tutorial from W3Schools, especially the paragraphs for home users.

http://www.w3schools.com/site/site_security.asp


Use Audit My PC to do three Penetration Testing.

http://www.auditmypc.com/freescan/prefcan.asp


Use Gibson Research's ShiedsUP to do port scan and get useful advice.

https://grc.com/x/ne.dll?bh0bkyd2


Download Gibson Research's LeakTest and check if personal firewall can be fooled. If the firewall is good, the LeadTest will not be able to reach the internet.

http://grc.com/lt/leaktest.htm


Browse Microsoft security home page to learn more about Windows security.

http://www.microsoft.com/security/default.mspx

14 Household Ways To Protect Your Computer From Viruses

Computer viruses are deadly. They often spread without any apparent contact and can be a nuisance, or even worse, fatal to your computer. Individuals who create these viruses, estimated at 10-15 new ones a day, are the electronic version of terrorists. Their goal is to inflict havoc and destruction on as many people as possible by disabling, stealing, damaging, or destroying computer and information resources. Often, they have no specific target in mind, so no one is safe. If you access the internet, share files or your computer with others, or load anything from diskettes, CDs, or DVDs onto your computer, you are vulnerable to viruses.

Fortunately, there are good guys working just as hard as the hackers to develop cures for viruses as quickly as they send them off into cyberspace. And there are many things you can do to keep your computer from catching viruses in the first place.

Defining Viruses:

A virus is a small computer program that can copy and spread itself from one computer to another, with or without the help of the user. However, viruses typically do more than just be fruitful and multiply, which is bad enough in itself because it hogs system resources. Anything else viruses are programmed to do, from displaying annoying messages to destroying files, is called their payload. Often, they cannot deliver their payload until an unsuspecting user does something to make the virus execute its programmed function. This could be as simple as clicking on an innocent looking file attachment with the .exe (executable) extension.

Catching a Virus:

Most viruses are spread through e-mail attachments because it's the easiest way to do it. Although Macintosh, Unix, and Linux systems can catch viruses, hackers are particularly keen on exploiting the security weaknesses in anything Microsoft, particularly Microsoft Outlook and Outlook Express. Because of the popularity of this software, hackers get maximum bang for their buck, and they probably get some satisfaction from continually reminding Microsoft that being big doesn't mean you're perfect.

Solution 1: Anti-virus Software

Your first line of defense is to install anti-virus software. To be extra safe, also install firewall software, which is now included in some anti-virus packages. This software can scan all of your drives for viruses and neutralize them. Here are some features to consider when evaluating anti-virus software.

- Compatibility with your operating system - Make sure the software works with your system, particularly if you are using an older operating system like Windows 98.

- Firewall software - If it's not included, find out if it's available. If you must, buy it from another vendor.

- Automatic background protection - This means your software will constantly scan behind the scenes for infections and neutralize them as they appear. This provides some peace of mind.

- Automatic, frequent updates - Because new viruses appear every day, you'll want regular updates. It's even better if they occur automatically when you connect to the internet. If automatic updating isn't included, you'll have to check the vendor's website and download updates yourself. This is vitally important, because you will not be protected from new viruses if your software is out of date.

- Disaster recovery - Software with a recovery utility to help you get your system back to normal after a virus attack is always good to have.

- ICSA certification - The International Computer Security Associatioin has standards for the detection rates of anti-virus software. Make sure your software has the ICSA certification.

- Technical support - It's a good idea to select a package that offers free technical support, either online or through a toll-free number. If you're ever felled by a virus, you may need it. Some anti-virus software vendors are Symantec Corporation (Norton AntiVirus), McAfee Corporation (McAfee VirusScan), Trend Micro Inc. (PC-cillin), and Zone Labs Inc. (Zone Alarm Suite).

Solution 2: The Virus Scan

If you receive a particularly juicy attachment that you're dying to open, save it on your Windows desktop and run your anti-virus software on it first. To do this, click once gently on the file on your desktop ... don't actually open it ... then right click and choose Scan with (Name of Anti-Virus Software) to activate a virus scan.

If it's infected, your anti-virus software may neutralize it, or at least tell you the attachment is too dangerous to open. On the other hand, don't feel guilty if the very thought of saving a potentially damaging file anywhere on your system is enough to quell your eagerness to open it and make you delete it immediately.

Solution 3: Delete first, ask questions later.

When in doubt about the origin of an e-mail, the best thing to do is delete it without previewing or opening it. However, some viruses, such as Klez, propagate by fishing in people's address books and sending themselves from any contact they find to another random contact. You can spread a virus just by having people in your address book, even if you don't actually e-mail them anything. They'll receive it from someone else in your address book, which really makes life confusing. Because of the proliferation of porn on the internet, e-mail viruses often tempt victims by using sexual filenames, such as nudes.exe. Don't fall for it.

Solution 4: Beware of virus hoaxes

E-mails warning you about viruses are almost always hoaxes. You may be tempted to believe them because you typically receive them from well-meaning friends, who received them from friends, etc. These e-mails themselves usually aren't viruses, but some have actually fallen into the hands of hackers who loaded them with viruses and forwarded them merrily on their way as a sick joke.

The proliferation of e-mails about virus hoaxes can become nearly as bad as a real virus. Think about it, if you obey an e-mail that tells you to forward it to everyone in your address book, and they THEY do it, and this goes on long enough, you could bring the internet to its knees. If you ever want to verify a virus warning, your anti-virus vendor may have a list of hoaxes on it website. It's in the business of providing the fixes, so it will know which viruses are real.

Solution 5: Beware of filename extensions

The extension of a filename is the three characters that come after the dot. Windows now defaults to hiding filename extensions, but it isn't a good idea. Just being able to see a suspicious extension and deleting the file before opening it can save you from a virus infection.

To see filename extensions in all your directory listings, on the Windows XP desktop, click Start button | Control Panels | Folder Options | View Tab. Clear the check box for Hide extensions of known file types. Click Apply | OK. System files will still be hidden, but you'll be able to see extensions for all the files you need to be concerned with. Viruses often live on files with these extensions - .vbs, .shs, .pif, .Ink - and they are almost never legitimately used for attachments.

Solution 6: Disable the .shs extension

One dangerous extension you can easily disable is .shs. Windows won't recognize it and will alert you before attempting to open an .shs file. The extension is usually just used for "scrap object" files created in Word and Excell when you highlight text and drag it to the desktop for pasting into other documents. If this isn't something you ever do, or you have Word and Excell 2000 or later, which allow you to have 12 items on the Clipboard, click the Start button | Control Panel | Folder Options | File Types tab. Under Registered file types, scroll down and highlight the SHS extension. Click Delete | Yes | Apply | OK.

Solution 7: Dealing with double extensions

When you turn on your extensions in Windows, you'll be able to detect viruses that piggy-back themselves onto innocent looking files with a double extension, such as happybirthday.doc.exe. NEVER trust a file with a double extension - it goes against Nature.

Solution 8: Beware of unknown .exe files

A virus is a program that must be executed to do its dirty work, so it may have an .exe extension. Unfortunately, this is the same extension used by legitimate program files. So, don't panic if you find files named Word.exe or Excel.exe on your system - they're your Microsoft software. Just don't EVER open any file with an .exe extension if you don't know what the file's purpose is.

Solution 9: Watch out for icons

Viruses in attachment files have been known to assume the shape of familiar looking icons of text or picture files, like the wolf in the hen house. If you recieve an unexpected attachment, don't open it without first running it through your anti-virus software.

Solution 10: Don't download from public newgroups

What better place for a hacker to lurk and stick his virus than in the middle of a crowd? Sooner or later, someone's bound to download it and get the virus going. Don't download files and programs from newsgroups or bulletin boards, or open attachments sent from strangers in chatrooms ("Let's exchange pictures!") without first scanning with your anti-virus software.

Solution 11: Avoid bootleg software

This may seem like a no brainer, but sometimes that tiny price tag on a popular but expensive package can be too good to resist. Resist it! Likewise, be careful about accepting application software from others. You don't know where it's been, and what may have started out as a perfectly clean package could have become infected during installation on someone else's infected computer.

Solution 12: Protect macros in MS Word, Excel, and Powerpoint

A common type of virus uses macros. Macros are sets of stored commands that users can save as shortcuts to perform long functions in just a few keystrokes. A macro virus may perform such mischief as changing file types from text files or spreadsheets into templates, locking up keyboards, and deleting files. Word, Excel, and PowerPoint come with macro virus protection. To make sure yours is activated, open each application, then click Tools menu | Macro | Security. On the Security Level tab, make sure Medium or High is selected. Clcik OK. If you are already infected with a macro virus, you may find that the steps of this procedure are unavailable becasue the virus has disabled them. In that event, run a virus scan on your system to see if your anti-virus software can kill the virus.

Solution 13: Use passwords

If you share your computer, it's a good idea to assign everyone a password. Passwords should be a combination of letters and numbers no less than eight characters long, and preferably nonsensical. Never write passwords and stick them anywhere near the computer. To assign passwords in Windows XP, click the Start button | Control Panel | User Accounts. Follow the prompts to assign/change passwords.

Solution 14: Update application software

Microsoft constantly issues patches for the security holes in its operating system and applications software. however, don't be lulled into complacency if you have Windows Update automatically checking things for you. Update checks for patches to repair bugs in the operating system, not for security problems.

To get the latest security hotfixes (as Microsoft calls them), visit www.microsoft.com and look for hotfixes for all your Microsoft software, particularly Outlook and Outlook Express.

Microsoft also has a free downloadable package called Microsoft Baseline Security Analyzer (MBSA) that scans your system for missing hotfixes. It works with Windows 2000 and XP Home and Professional only. It doesn't support Windows 95, 98, or ME.

To download the MBSA, go to the TechNet section of the Microsoft Website. Be warned that the information is written in techie language, so you may find it daunting.

Last Words:

Now that you know some ways for avoiding and dealing with viruses, let's wrap things up with some solution you've probably heard before but have ignored.

- Back up your files regularly - If a virus crashes your sytem, you'll feel much better if you've got backup copies of all your important files. Make the backup copies on a media that's separate from the computer, such as on diskettes, CDs, or zip disks. Scan them for viruses before you put them away to make sure they aren't infected. If they are, they'll do you no good if you ever have to use them because they will just transmit the virus right back onto your computer.

- Make a boot disk - Create an emergency boot diskette before you have a problem so you can start your computer after a serious security problem To make a boot diskette with Windows XP, put a blank floppy disk in the drive. Open My Computer, then right click the floppy drive. Click Format. Under Format options, click Create an MS-DOS startup disk. Click Start. Keep the disk in a safe place. With luck, you'll never need to use it.

- Turn off you computer - DSL and cable connections that are "always on" may be convenient, but you should always turn off your computer when its not in use. Hackers can't get to a machine that's powered off.