Greetz.
I would suggest that you first download a decently good virus protection program that includes the option to remove the virii. Something other than McAfee preferably, I can't STAND that crap. Norton is good.

I have several questions though. What virus scan program were you using to find the virii? Okay, so I only had one question... moving right along...

My desktop freezes often when sending/recieving IM's. After I defraged my hard drive, the performance of my box was much better. I suggest that you do the same. Also, check your RAM. Something might be hogging your memory, causing your box to lock up. As far as I know, when you change your password with AIM, it is standard to get a confirmation e-mail from a mail daemon verifying the new settings.

Ooh... I do have one more question... What ISP are you using? Is it local or national? Are you using AOL, or just have their Instant Messenger program?

Answer these questions, and I will see if I can provide any more advice. I hope it helps.

Good luck, and God bless!