Please fill in your System Specs so we can better assist you.
Start off with the following tests:
Do a Memtest86+ and run for at least 7 passes (6-8 hours): RAM - Test with Memtest86+
Do a sfc /scannow
Do a Disk Check
Lastly, run a HDD Test (using SeaTools)
nvm62x64.sys Fri Oct 17 17:01:06 2008
nvlddmkm.sys Thu May 14 16:48:07 2009
ASACPI.sys Sun Mar 27 22:30:36 2005
Update your video card drivers and network card drivers
Drivers - Download NVIDIA Drivers
The 2005 version of this driver is a known BSOD cause.
Please visit this link: ASUSTeK Computer Inc.-Support- download_item_mkt
Scroll down to the Utilities category, then scroll down to the "ATK0110 driver for WindowsXP/Vista/Windows 7 32&64-bit " (it's about the 12th item down).
Download and install it.
Go to C:\Windows\System32\drivers to check and make sure that the ASACPI.sys file is date stamped from 2009 or 2010 (NOT 2005).
Also make sure that you have all your window's updates installed. This includes any optional updates you may have (except for language packs)