PR CTD after every round/Lashkar Valley

[Vision_16]

I will play a round fine with no problems then when the round ends and the load for the next map is approximately halfway, my PR crashes to desktop. Previously, I had thought it was because my iTunes was open, but I closed it and played, and it did the same thing. I have no other programs running so it's not that.

I have also had problems with Lashkar Valley. I can barely load into the map now before it crashes to desktop.

Specs:

Manufacturer:
Alienware
Processor:
AMD Phenom(tm) 9950 Quad-Core Processor (4 CPUs), ~2.6GHz
Memory:
3326MB RAM
Hard Drive:
491 GB
Video Card:
NVIDIA GeForce GTX 260
Monitor:
Dell 2009W(Digital)
Operating System:
Windows Vista™ Home Premium (6.0, Build 6001) Service Pack 1 (6001.vistasp1_gdr.090302-1506)