Forum:Game worked near perfectly since release, then within the last 3-4 days i get random crashes, help?

As stated in title game was working near perfectly since release, then in the past 3-4 days it crashes within 1-30mins of playing. Ive got updated drivers and everything (running vista) but still crashes. I've also downloaded and fresh installed (via steam) the game on a Brand new computer (with fully updated drivers, etc.) and same problem. Here is the error report:

Problem Event Name:	APPCRASH Application Name:	FalloutNV.exe Application Version:	1.1.1.271 Application Timestamp:	4cc0aa87 Fault Module Name:	FalloutNV.exe Fault Module Version:	1.1.1.271 Fault Module Timestamp:	4cc0aa87 Exception Code:	c0000005 Exception Offset:	001df43c OS Version:	6.0.6002.2.2.0.768.3 Locale ID:	1033 Additional Information 1:	fd00 Additional Information 2:	ea6f5fe8924aaa756324d57f87834160 Additional Information 3:	fd00 Additional Information 4:	ea6f5fe8924aaa756324d57f87834160

If anyone has a solution to the problem, please post ^_^ thank you.