OS: Windows 8.1.x64 Motherboard: Gigabyte Video card: GTX 650 I recently had to change my motherboard due to faulty hardware. Now my performance for graphics intensive applications is way down. I had to manually restore my registry from the RegBack folder to even boot into my PC. I have tried updating the device drivers but it made to difference. My guess is because the drivers for the previous motherboard still exist in the OS memory and might be causing the performance issues. Will a sysprep help here? Can I do a repair install of Windows without losing my installed applications? I might need to reactivate but I don't want to set up my workstation from scratch again. Let me know if any further information required from my side. Any suggestions?