HD5850 "Display driver stopped responding"

I fixed my problem CPT. Go to device manger and see if you have 2 different audio devices disable ati high def audio. I looked under sys info and had 2 audio devices and ati audio device's status was "error" i disabled it and found that one of my sticks of ram was bad and its all good now
 

My Computer My Computer

Computer Manufacturer/Model Number
Custom
OS
Windows 7 x64bit
CPU
AMD Phenom x4 965 Quad 3.4 Ghz
Motherboard
Asus MB-M4A79XTD-EVO
Memory
OCZ 1333 6 gigs
Graphics Card(s)
MSI R5850-PM2D1G OC Radeon HD5850 1GB PCI Express 2.1
Sound Card
Normal
Monitor(s) Displays
HP L2045 W
Hard Drives
WD Caviar Green 3.5in 750GB SATA 3.0Gb/s
PSU
Corsair TX Series 850W
Case
Black NZXT TEMPEST
Cooling
Air. Cpu Fan = ASUS Silent Knight AL
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