I've no idea... either his problem is now fixed, or the delay has gotten longer than a minute :(

Try going to start>run and entering the following:

control userpasswords

This should load the user accounts as normal.
Alternatively, you can try:

control userpasswords2

which is the...

Mine does something along the same lines. But only since I installed Windows Defender...
Killed the service and stopped the exe from loading in the registry on boot and the problem has gone away.
...