REG ADD HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate /v DisableOSUpgrade /t REG_DWORD /d 1
REG ADD HKLM\SOFTWARE\Policies\Microsoft\Windows\Gwx /v DisableGwx /t REG_DWORD /d 1
to prostě řeší. 

REG ADD HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate /v DisableOSUpgrade /t REG_DWORD /d 1
REG ADD HKLM\SOFTWARE\Policies\Microsoft\Windows\Gwx /v DisableGwx /t REG_DWORD /d 1
to prostě řeší.