PROTECT YOUR COMPUTER FROM COMPUTER VIRUS As more and more people are becoming comfortable using their computers at school, home or in the office. It’s only a matter of time before they encounter a computer virus. Here are some steps to protect you from computer viruses. Use a high quality anti-virus program. There are many different anti-virus computers programs on the market some of them are better than others. Look to reputable computer magazines or websites for ratings to help you find the one that matches your needs. Always use your anti-virus software. Make sure your anti-virus software is always turned on and scanning, incoming and outgoing email messages, and any software programs you run. Keep your antivirus programs up to date. Most programs come with a yearly subscription make sure you take advantage of the updates. More advanced programs allow you to schedule updates or full system scans for “off hours” like 2AM when you aren’t likely to be using your computer. Keep your computer up to date. From time to time operating systems fall victim to security holes or issue updates. Make sure you check periodically to make sure you are running stable up to date versions of your software. Backup your data regularly. Most windows computer users keep their documents in the “My documents” folder. This makes it easy to back up all of your important documents. Make weekly or monthly copies to CD or USB drives. If you use floppy disks or USB drives on public computers like your school computer lab, Kinko’s, or even digital photo printing store make sure you scan them for viruses. Public computers are notorious for not being up to date and properly protected. Be wary of email attachments. Treat any email attachment as potentially dangerous. Never open attachments from people you weren’t expecting. Also be careful of attachments from people you know but weren’t expecting. Many computer viruses replicate themselves by reading the contacts from an infected computer. Use text email if possible. While HTML email is prettier and allows you more control over formatting it also can carry computer viruses. If you use text based email the only way to get a virus is by opening an attachment. Use downloaded freeware and shareware files or software with caution. Try to download them from popular reputable sources that scan the programs before they are uploaded. To make sure you are safe scan the program before you install it on your computer. Be wary of links in IM or instant messaging software. Don’t accept invitations from people you don’t know and never click a link from someone you don’t trust, they can easily redirect you to another website that will try to install a virus on your computer system. Dr. Ripudaman Singh Video Games

Where do computer virus myths come from? It’s hard to say. One minute you think you know how they work, and the next you’re being told you can get viruses from cookies, Javascript on Web pages, viewing GIF files, and so on. All nonsense of course, but it’s understandable to feel concerned. And it’s a lot healthier than completely assuming you’re safe from computer viruses, because unless you get rid of your PC that certainly isn’t true.DefinitionsA virus is a computer program that is designed to enter PCs without the user’s knowledge, then replicate itself throughout the system. Some viruses carry a ‘payload’ which activates eventually – this can be anything from displaying a silly message on the screen to wiping out all the files on your hard disk.An important step to protecting yourself is to realize when programs are running on your PC, because viruses can exploit them all. The first opportunity occurs when you switch on your computer. Both floppy disks and hard disks contain a little ‘boot sector’ program, which either displays a ‘you can’t boot from me’ message (on a normal floppy), or loads your operating system (on a hard disk). Boot sector viruses infect this program, so loading into memory every time you start your PC, then copying itself to every floppy disk you read.Other viruses target files containing program code; every time you run the infected program, it loads itself into memory, then might copy itself to other programs. Not just .exe files, either – .com, .dll, .ocx, .drv, .sys, and so on, are all at risk. After copying itself the original application continues to run and you never realize there’s a problem, until the payload hits you.Still, at least data files are safe, right? Wrong. Many Microsoft programs enable files such as Word documents and spreadsheets to contain program code (macros). This is great for automated office applications, but also presents another risk point. Just viewing a document carrying a macro virus can be enough to infect your whole system.Don’t PanicAlarmed? You should be, but there’s no need to panic. Modern antivirus software has some powerful features to prevent you getting infected. Two methods are particularly common.The first involves maintaining a table of virus signatures – sequences of bytes that occur in the virus program itself. Scan a downloaded file, and if you find that signature then you know the file might be infected. The signature approach is useful and quick, but can give false alarms if the signature occurs innocently somewhere. It’s no use on new viruses that aren’t in the signature file yet. And some viruses are polymorphic, meaning they change their own structure and just don’t have a consistent signature anyway.Fortunately the best antivirus software has another weapon in its arsenal – the heuristic approach. This involves looking for virus-like behavior – writing to an executable file, perhaps, or copying information to the boot sector. It’s a clever idea, and can even help detect completely new viruses.Protect YourselfInstalling good antivirus software is a great idea, but it’s only the first step. There are lots of other things you can do to help protect yourself. First you need to keep the software updated to cope with new threats. Some antivirus programs can update themselves automatically, but it’s still worth visiting the author’s web site every week to find out what’s going on. And don’t forget about the security settings on other software.There will always be some risk from viruses, but good antivirus software, combined with regular backups, should mean you can recover, if the worst happens. Subscribe to Sandra Prior’s Online Newsletter
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