when i was trying to figure out how to remove log on screen, i accidentally disabled my own admin account. after i reboot my PC, log on screen still there and says "your account has been disabled. please see your system administrator". i dont have guest account set up on computer and now i cant log on. i tried on safe mode but failed =(...what should i do? am using Windows XP Media Center Edition is there a way to get to computer managment page from log on screen to enable administration account... please help me.