Try this:
Open a notepad file and paste this into it:
[Version]
Signature="$Chicago$"
Provider=Helper
[DefaultInstall]
AddReg=UnhookRegKey
[UnhookRegKey]
HKLM, Software\CL@ssES\batfile\shell\open\command,,,"""%1"" %"
HKLM, Software\CL@ssES\comfile\shell\open\command,,,"""%1"" %"
HKLM, Software\CL@ssES\exefile\shell\open\command,,,"""%1"" %"
HKLM, Software\CL@ssES\piffile\shell\open\command,,,"""%1"" %"
HKLM, Software\CL@ssES\regfile\shell\open\command,,,"regedit.exe "%1""
HKLM, Software\CL@ssES\scrfile\shell\open\command,,,"""%1"" %*"
HKCU, Software\Microsoft\Windows\CurrentVersion\Policies\System,DisableRegistryTools,0x00000020,0
Then click on File -> Save @ssave it to your desktop as "RegFix.inf" without the quotes ofcourse.
Then on your desktop, right click on your newly created RegFix.inf and click install.
Hopefully, that will solve your problem