Try what whs suggested. You may have corrupted RAM, or your RAM may be failing. I highly doubt it was the virus from frostwire, since tis happened a while after the virus...

Although it says Windows 2000/XP, it still applies to Vista... Hardware wil have the same problems/symptoms no matter what OS you use.

1. Blue screens during the install procedure of Windows 2000 or XP. This is one of the surest signs of faulty memory.
2. Random crashes or blue screens during the running of 2000 or XP. Note that heat can also be a culprit in the case of general flakiness like this, so you should test for that possibility too.
3. Crashes during memory intensive operations. 3D games, benchmarks, compiling, Photoshop, etc.
4. Distorted graphics on screen. This can also be related to the video card.
5. Failure to boot. This can be accompanied by repeated long beeps, which is the accepted BIOS beep code for a memory problem. In this circumstance, you cannot test the memory with diagnostic software, so your only option is testing by replacement, either at home or at your computer dealer.

Originally Posted by Snow(ConFed)

Try what whs suggested. You may have corrupted RAM, or your RAM may be failing. I highly doubt it was the virus from frostwire, since tis happened a while after the virus...

Although it says Windows 2000/XP, it still applies to Vista... Hardware wil have the same problems/symptoms no matter what OS you use.

1. Blue screens during the install procedure of Windows 2000 or XP. This is one of the surest signs of faulty memory.
2. Random crashes or blue screens during the running of 2000 or XP. Note that heat can also be a culprit in the case of general flakiness like this, so you should test for that possibility too.
3. Crashes during memory intensive operations. 3D games, benchmarks, compiling, Photoshop, etc.
4. Distorted graphics on screen. This can also be related to the video card.
5. Failure to boot. This can be accompanied by repeated long beeps, which is the accepted BIOS beep code for a memory problem. In this circumstance, you cannot test the memory with diagnostic software, so your only option is testing by replacement, either at home or at your computer dealer.

Agreed. I have had this problem twice. Years ago, I had this happen on an HP. Played around with the RAM and replaced it with another stick and it never did it again, then about a year later, after I built my first pc, that one did it too. Go figure, I got a new stick of RAM ,and the problem was gone.
That may not be the ONLY thing to cause it, but it seems to be the most common.