My computer freezes about every 3 minutes for 5-10 seconds. It suddenly started doing this yesterday, though for no apparent reason. No matter what I am doing, it will still freeze for that duration, i.e. scrolling on the internet, typing, listening to music, watching a DVD (pauses the DVD for a few seconds, then stutters for a few more while it picks back up). It's maddenly annoying, given how often I am on. I do have a Trojan Downloader virus on my computer, the infected file being C:\WINDOWS\system32\winjyp32.dll, though I've no I idea if this is even the source of the problem (I cannot delete it, even with updated Norton definitions, and while in Safe mode). Could this be a result of this virus, or could I be having hardware troubles of some sort?

Try an online virus check at http://housecall.antivirus.com/ Do yourself a favor BACKUP!!!

Try the advice at this site.

You could go to the (Private Manufacturer) and update all of your drivers.

The short answer is yes the Trojan could be causing this. I would advise you get rid of it as soon as possible....you have no idea what it is capable of doing to your computer and personal information.