Joas
Perdona, es que..
lee la parte de abajo...
basicamente hay que borrar
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\nowindowsupdate
te cipio para que no te lo leas otra vez
Click Start, click Run, type regedit in the Open box, and then click OK.
Expand HKEY_CURRENT_USER, expand Software, expand Microsoft, expand Windows, expand CurrentVersion, and then expand Policies.
If the Windows Update key exists, click Windows Update.
In the right pane, if the DisableWindowsUpdateAccess DWORD value exists, right-click DisableWindowsUpdateAccess, and then click Delete.
Expand HKEY_CURRENT_USER, expand Software, expand Microsoft, expand Windows, expand CurrentVersion, and then expand Policies.
If the Explorer key exists, click Explorer.
In the right pane, if a DisableWindowsUpdateAccess DWORD exists, right-click DisableWindowsUpdateAccess, and then click Delete.
In the right pane, if a NoWindowsUpdate DWORD value exists, right-click NoWindowsUpdate, and then click Delete.
Expand HKEY_LOCAL_MACHINE, expand Software, expand Microsoft, expand Windows, expand CurrentVersion, and then expand Policies.
If the Explorer key exists, click Explorer.
In the right pane, if a DisableWindowsUpdateAccess DWORD exists, right-click DisableWindowsUpdateAccess, and then click Delete.
In the right pane, if a NoWindowsUpdate DWORD value exists, right-click NoWindowsUpdate, and then click Delete.
Close Registry Editor, and then restart your computer