1, Run Memtest86+
2, Uninstall unstable software:
AVG
Daemon Tools
Gigabyte bloatware
MagicISO
Also uninstall Audials, Teamviewer and Acronics True Image if you don't use them and if you use them update them if possible.
3, Update drivers:
Realtek PCIe GBE Family Controller
fffff880`06e31000 fffff880`06e9b000 Rt64win7
Wed Jan 26 14:34:03 2011 (4D4022CB)
AMD IO Driver
fffff880`07098000 fffff880`070ac000 amdiox64
Thu Feb 18 16:17:53 2010 (4B7D5A21)
Etron USB 3.0 Extensible Host Controller
fffff880`07128000 fffff880`07135f00 EtronHub3
Fri Aug 05 00:00:28 2011 (4E3B167C)
Name ATI HDMI Audio
fffff880`071a5000 fffff880`071ecc00 RtHDMIVX
Tue Nov 23 11:27:12 2010 (4CEB9700)