Hello
1. Check registry for errors with reg organizer or similar software;
2. Press Win+R, type "cmd" (without quotes). Then type "sfc /scannow" command (without quotes) to check windows system files for integrity. If it says something about admin rights, then right click on win logo in lower left corner, and left click on windows powershell (admin), then type "sfc /scannow" command (without quotes);
3. Disable all unwanted software in autorun (like fraps, punto switcher, raptor etc);
4. Run malwarebytes anti malware tool to scan pc for malware soft.
5. Reinstall Microsoft Net fra