Answer:
Start>Run>REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableRegistryTools /t REG_DWORD /d 0 /f Press Enter/OK, and regedit should work.
First answer by Cumquatcrazy. Last edit by Cumquatcrazy. Contributor trust: 7 [recommend contributor recommended]. Question popularity: 14 [recommend question].