-SP1 has no entries anywhere, so can't be uninstalled
-can't reinstall SP1 again
Can I just remove a file or a registry key to make it think i don't have it (so that it overwrites existing files)?
It should be listed as an installed update. KB976932.
Windows 7 has been end of life for over a month now. You may want to considered upgrading to Windows 10 or a Linux distro. All Windows 7 licenses should activate under Windows 10.
1-It isn't listed anywhere, is there any uninstaller?
2-Is this forum by anyway linked to Microsoft Support? (as Windows 10 is a disaster in my and many others opinions)
I deleted this key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\Packages\Package_for_KB976932~31bf3856ad364e35~amd64~~6.1.0.17514