Test your RAM using Memtest86+. Let it run until 6-8 passes have completed or errors have been found. RAM - Test with Memtest86+
You have AVG installed, is that correct? At least to test, uninstall it and install MSE (Microsoft Security Essentials) instead. Microsoft Security Essentials - Free Antivirus for Windows
The following drivers
need to be updated:
btwl2cap.sys Sat Apr 04 11:28:45 2009
CtClsFlt CtClsFlt.sys Mon Jun 15 15:06:41 2009
DefragFS DefragFS.SYS Sat Jun 06 01:14:38 2009
GEARAspiWDM.sys Mon May 18 22:17:04 2009
hamachi.sys Thu Feb 19 21:36:41 2009
rp_pkt64 rp_pkt64.sys Fri Apr 06 04:51:01 2007
rp_skt64 rp_skt64.sys Thu Nov 27 07:15:20 2008
These drivers can be found by searching them in Google
and then finding the associated software or driver
. Finally, find the latest version of this driver or software and download and install it. Some of the drivers may also be found here
(if the driver says 'Windows Update' simply make sure all Windows Updates are installed).
You should also update any other drivers you can think of including graphics, audio, chipset, SSD etc.