I had a trojan long ago [I told you all about this] that affected my system so back, I had to clean out my computer AGAIN shortly after cleaning it already. But thank God that there were no personal files in my computer at the time.
The trojan let a ugly wallpaper on my desktop with a warning message that instructs the user to go to such-n-such place [whatever] and the wallpaper was permanent.
Here's a tip guys:
The next time you clean out your computer, make sure that your firewalls and antivirus programs are installed PRIOR to connecting to the next.
PS: Did I mention that I also got hit by the blaster worm at the same time?
