New
#11
Remove Daemon Tools/Alcohol 120%. They use a file sptd.sys, which is notorious of causing BSOD on Windows 7. Use this SPTD uninstaller when DT/Alcohol is removed: DuplexSecure - Downloads
Select Uninstall, DO NOT SELECT REINSTALL
You may use MagicDisc as an alternative: Freeware MagicISO Virtual CD/DVD-ROM(MagicDisc) Overview
Read this 0x124 article: Stop 0x124 - what it means and what to try
As Maguscreed said, if you are overclocking anything - return to default values.