...a recommendation based on his comment in the previous entry.
Go here and download AVG antivirus. It's free, as are the updates, and is very effective!
I also suggest going here to get AdAware SE, a free spyware remover. Also very good.
The source of the "trojan horse" that blitzed my ex-computer was a program I was given by a "friend" who swore up and down that it had been checked and was clean. I didn't scan it with AVG before I opened it.
Yeah, I'm a dummy.
1 day ago