Thank you for the replies everyone. I have begun a clean install of win7, and I will no longer mess with the registry. I'll let you know if the problem persists.
My Computer
At a glance
Windows 7 64-biti5 2500k @ 3.30 GHz8GB DDR3 1333 MHz KingstonAMD Radeon HD 7870 (oc)
OS
Windows 7 64-bit
CPU
i5 2500k @ 3.30 GHz
Motherboard
P8H77-M PRO
Memory
8GB DDR3 1333 MHz Kingston
Graphics Card(s)
AMD Radeon HD 7870 (oc)
Monitor(s) Displays
Maestro 235DL
Screen Resolution
1920x1080
Hard Drives
Samsung 103SJ ATA 931GB
Buffalo External HDD 931GB
Everyone, my issue was solved by the clean windows re-install! I'll keep a good distance from system tweaking from now on. Thank you so much everyone for helping me from the bottom of my heart. PS. Merry xmas
My Computer
At a glance
Windows 7 64-biti5 2500k @ 3.30 GHz8GB DDR3 1333 MHz KingstonAMD Radeon HD 7870 (oc)
OS
Windows 7 64-bit
CPU
i5 2500k @ 3.30 GHz
Motherboard
P8H77-M PRO
Memory
8GB DDR3 1333 MHz Kingston
Graphics Card(s)
AMD Radeon HD 7870 (oc)
Monitor(s) Displays
Maestro 235DL
Screen Resolution
1920x1080
Hard Drives
Samsung 103SJ ATA 931GB
Buffalo External HDD 931GB