music downloads

[outtafocus]

Well atfter having Limewire on my computer for about a week, I get a mysterious computer problem.
I start up like normal, comp seems to boot up then displays the "It is now safe to turn off your computer" banner and off it goes.

I have no idea if this is actually related to Limewire at all but seems to coincedental to me. I believe this must be a virus, if it is it slipped through the AVG virus scan I have.

In a hurry to fix this problem and also in desperate need of an upgrade I picked up a new computer on Sunday.

Does any one have any suggestions on how to ensure this never happens again? Remembering that I am kinda computer illiterate and I need things spelled out to me.

I want to keep this computer running good. Thanks.