Computer keeps crashing and I don't know why

Everything seems to be running fine but then all of a sudden:
A: Screen Freezes and all I can do is move the mouse
B. Screen goes all fuzzy while playing an on-line game
C: Blue screen of death

I have checked and updated all important drivers and I also installed HijackThis and will post the log below.

Any help would be appreciated, especially on how I can diagnose why this is happening and pinpoint the issue.

Thanks in advance.

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 5:14:40 PM, on 1/21/2009
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP3 (6.00.2900.5512)
Boot mode: Normal

Moderator Edit:
Pasted log removed

Sorry I am unable to post the remainder of the log file due to it having links in it??? Let me know how important this is and I can try to figure something out.

paste it as an attachment so we don't have to it the down arrow so much. but i dont think its an infection sounds like a hardware or driver issue. we'll probably need to see your.dmp file.

HijackThis.log file

Not sure which one you want. So here is the latest from the mimidump directory.