Help set permissions to registry key when access denied:
\software\Security\Utilities\SetACL_permissions\64 bit\SetACL.exe
For exemple:
HKEY_CLASSES_ROOT\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}
Move the SetACL.exe file to C:\Windows\System32
SetACL -on keyname -ot keytype -actn action

Command 1:
It will make the administrator as the owner of the registry key.
SetACL.exe -on "HKEY_CLASSES_ROOT\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}" -ot reg -actn setowner -ownr "n:Administrators"
Command 2:
It will grant full permission to the administrator for the registry key.
SetACL.exe -on "HKEY_CLASSES_ROOT\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}" -ot reg -actn ace -ace "n:Administrators;p:full"

The key can now be edited.

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keywords: accès refusé registre registry regedit