I have been having the same problem.I only have one accout with administrator rights, no administrator to choose from.Nothing runs from the search window (regedit, controlpasswords2, cmd, command, etc)when trying to acess the command window through the start menue, acessories, then run aas administrator, it just flat out isnt there to be run as adminitrator.Until this mornign all i had to do to was turn my computer on and it booted to desktop and no passwords. This morning its prompting for a password and says the profile cant load. When trying to create a new user it shows the admin shield next to the options, shows it can be clicked but will not do anything beyond that.when trying to run compmgmt.msc it shows it in the list to be clicked on, but nothign happens when i press enter, or try clicking on it. The start menu goes away.i had 23 updates install themselves after this problem started, and it seems like it didnt affect the problem or make a sulution either.Also, when looking into doing a system restore, it seems any restore points beyond this mornign are gone for the last year. But there are some from well over a year ago.From my viewpoint, it seems like i am not being forced to log in as a user now and everything was wiped out or didnt exist in the first place for the user PID Any thoughts on this? specifically getting admin rights in safemode when the menu options arent there?