Your post didn't reveal what you use to find pests and parasites. New exploits of Internet Explorer can install KEY LOGGERS which are showing up as copy/paste failures and more.
Please visit the Security Forum and ask what they think you should use.
Bob
I have a dell desktop that is running XP. My keyboard just starting to require you to hold down each character for about 2 seconds before you see it on the monitor. I tried to update my keyboard driver and reinstall it, with no success. Tried 2 new keyboards also, no luck. Must be something wrong with the computer. If you have any idea please let me know. Thank you.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic