Just a word of warning about using backups. Back when I was doing tech support had a fellow call complaining that he "had the same problem as before." Checked the call log and discovered that we had just walked him through reinstalling Windows '98, (about a two hour process) a few hours previously due to a virus. I asked what he had done since the reinstall. His answer? "I had a complete backup and I used it." Of course the problem with that was that his backup had included the virus that had caused the problem in the first place.
My point? Be sure your backup is of a healthy computer. Better yet, just backup the files you can't replace. You can always reinstall your operating system from the original disks.
Yet another warning; There are viruses that will survive both a format and repartition. There are ways to eliminate them, but it's difficult, particularly if your computer is already infected.
OldGuy43's Computer Safety Tips:
1. An ounce of prevention is worth a pound of cure. Install a good anti-virus program and set it to run everyday automatically. A good firewall is also a must.
2. If you lay down with dogs don't be surprised if you wake up with fleas. Be very selective as to what sites you visit. This is particularly important for links you receive in unsolicited emails.
3. Do not let your computer automatically download and install or update anything without your approval. I include Windows updates in this one. Any site, including Microsoft can and has been 'hacked'.
4. Avoid like the plague any of the so-called hacker sites. They are your best source for viruses.
5. If a friend gives you a program to try, run your virus scanner on it both before and after installing it.
6. Keep a close eye on your startup files. If you see something you don't recognize, remove it.
7. If your computer starts to run slowly don't assume it's a virus. Run a good registry cleaner and defragment the hard drive.
If enough of you good folks show an interest I'll be happy to expand on this, or just PM me with specific questions and concerns.