I wanted to change my default storage location to my secondary drive and went in regedit and into Windows\CurrentVerison and changed anything in there that had C:\ to F:\ (my secondary hard drive). I restarted and wanted to go back to regedit but it says can't find "C:\Windows\regedit.exe" I've went to C:\Windows and found the regedit.exe application but when i double clicked it, I got the same prompt. I can't open CMD or System Restore. I installed Windows using a bootable USB. Any help would be great thank you