How to Fix Device Manager Devmgr.dll Error

1. Log in to the computer as Administrator.
2. Click 'Start,' then type 'run' into the search box and press 'Enter.' Click the 'Run' link and type 'cmd' into the text field, then press 'Enter.' A new Command window will come up.
3. Type the following command into the Command window:regsvr32 devmgr.dllPress 'Enter.' After executing this command, Windows will be aware of the existence and location of 'devmgr.dll', so its absence will no longer prevent Device Manager from running.