You should have full time antivirus software installed and running on your
computer at all times. You also need protection from adware and spyware.
Install antivirus software now and make sure it starts when your computer
starts and runs in the background at all times.
Install an adware and spyware detector now and learn how to use it. Here is
one good example of this type of software: Ad-aware 6. Get it here:
www.lavasoftusa.com
When you get error messages, don't just click past them. Those messages are
telling you that your computer has a problem. You need to solve the problem.
You need to be very careful about what you download from the Internet, or
what you click on while you're on the Internet. You should apply common
sense and caution. Viruses and spyware don't advertise themselves.
"Protect Your PC"
http://www.microsoft.com/security/protect/default.asp
If you are very certain that your computer is not affected by viruses,
trojans, worms, adware, spyware, etc. and can't identify any other cause for
your problems, then you're looking at a re-install.
Rocky