First thing i noticed is the BIOS date of your system. It is clearly not certified for "Window 8".
Compatibility might be an issue here.
[BIOS Information (Type 0) - Length 24 - Handle 0000h] Vendor American Megatrends Inc.
BIOS Version 1401
BIOS Starting Address Segment f000
BIOS Release Date 01/09/2009
BIOS ROM Size 100000
Please try the below steps.
1. Update system BIOS.
Download and update to the version 2701 from the below link.
This is also pre-Win8 but contains several stability improvement fixes.
2. Update ATI chipset driver.
3. Uninstall AVG antivirus and Superantispyware.
Kernel mode drivers used by AV programs can cause rogue blue screens. Until the system became stable, it is better to stick with the built in "Windows defender".
After uninstalling them through Control Panel, use the official removal tools to clean the leftovers. Otherwise Kernel mode drivers may not be removed properly.
AVG removal tool : http://download.avg.com/filedir/util..._2014_4116.exe
Superantispyware removal tool : http://www.superantispyware.com/down...ASUNINST64.EXE
4. Update Realtek LAN driver.