windows credential have been disabled 7
Credential Manager has been disabled by Administrator and cannot re-enable
Windows credentials have been disabled by your system administrator problem

Use lusrmgr.msc to fix the problem


Click on Users and double click on the problematic account.

When Properties windows open, make sure that Account is a disabled option isnt checked.
Click Apply and OK to save the changes and restart your computer.

After doing that, you should be able to access your administrator account again.