Download, install, run then update the definitions in Malwarebytes in safe mode + networking. Scan the system with it and let it remove anything it finds.
Then try running an sfc /scannow again, after a reboot to safe mode.
did it and it found no errors.do a repair install from DVD
yeah. i tried all the repair options. system repair, windows diagnostic, etc... nothing helpedyou mean problem is still the same?