Is it possible that the user named 'Administrator' is removed from the 'Administrators' group? You can check this by entering lusrmgr.msc
, and see in the Groups
section if the Administrators group contains the Administrator user.
Besides that you can try if setting the User Account Control (Start
-> Control Panel
-> User Accounts
-> Change User Account Control Settings
) option is set to Never Notify
to avoid UAC blocking the installation of the drivers.
Finally, if these options doesn't work out, try to find out using Sysinternals Process Monitor
what is bothering the installation of the drivers.
Hope this helps you and good luck with this weird problem!