Zazdro. Masz okazję przetestować różne dziwne sposoby, np.

https://github.com/Push3AX/GrabAccess

czy np. takiego buga z dostępem do cmd podczas aktualizacji:

exploiting the bug takes nothing more than pressing Shift + F10 during the upgrade and you can then access the Command Prompt in the Windows PE (Preinstallation Environment) used during the upgrade.

Laiho says:

The real issue here is the Elevation of Privilege that takes a non\-admin to SYSTEM \(the root of Windows\) even on a BitLocker \(Microsoft’s hard disk encryption\) protected machine\. And of course that this doesn’t require any external hardware or additional software\.