hey! ive been using win7 for almost half a year now, and never had ANY problems until recently when ive started getting some totally random blue screens. i saved the crash info from one of the crashes:
Problem Event Name: BlueScreen
OS Version: 6.1.7600.2.0.0.256.48
Locale ID: 1044
Additional information about the problem:
OS Version: 6_1_7600
Service Pack: 0_0
Files that help describe the problem:
Quite often a BSoD indicates bad RAM.
Suggest you try removing all the RAM and booting with one strip at a time.
Swap out the strips until you have booted with all the strips individually.
One of the strips might behave different than the others.
Chances are that's your bad boy.
The PFN_LIST_CORRUPT bug check has a value of 0x0000004E. This indicates that the page frame number (PFN) list is corrupted.
This error is typically caused by a driver passing a bad memory descriptor list. For example, the driver might have called MmUnlockPages twice with the same list.
Run through the following steps and see if the issue is resolved.
1. Update all major drivers loaded in your system. Video, Sound, Network, and Chipset are the 4 big ones.
2. As Gandalf suggested, you may have bad RAM. I'm going to disagree with his method though, and say that you should Download, burn, and boot from Memtest86+ to test your ram. Let it run through at least 2 passes (let it go overnight). If no errors are detected, move on.
3. Download a copy of the Ultimate Boot CD (www.ultimatebootcd.com) and run some of the integrated hard drive diagnostics, as you may be in the early stages of drive failure.
If none of these solve the problem, post back and we will see what else we can come up with.