I found this on a website.

Note: Once this tweak has been implemented any subsequent users accounts that are created will inherit the 'NoLogon' value and therefore reboot when they login. To avoid this; when you first create a new user, open the key below for the newly created account name (e.g. [HKEY_USERS\jdoe]) and remove the 'NoLogon' value.
Website:
http://www.pctools.com/guides/registry/detail/629/

I dont really understand this please could some one explain, also i cant find my username in the HKEY_USERS.

Also could i set user restrictions on using this method.