Restrict Access to Windows Update

Again, if you don’t want your friends (or enemies) to make any changes to your system, you can consider, amongst other things changing a registry setting to restrict access to Windows Update.

Navigate to:
HCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer

And to:

HLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer

In both these locations, create a new DWORD value named NoWindowsUpdate and set it to 1

The restriction can also be enforced by setting the DisableWindowsUpdateAccess DWORD Value to the following key:

HCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\WindowsUpdate

Refresh your desktop or restart your Windows session for the change to take effect.