Some software checks if sp1 installed or not just by looking into OS name in env.
This works only if win7 was originally installed from SP1+ CD/USB image, but not if was upgraded with windows update.
In my case i have had sp1 KB installed via Windows update several years ago, so there will be no sighs of SP1 installed in ProductName
I just added Service Pack 1 to CSDVersion , and SP1 to ProductName
HKLM\Software\Microsoft\Windows Nt\CurentVersion
This fixed at least:
-- MS .NET Framework 4.8 (blocked installation)
-- Paint.NET
-- Windows update Error WindowsUpdate_80244004 ( 80244004)
