I lent my laptop to someone and when I received it back the only account I could get into is guest. I am using windows 7 starter. Everything I try to do to try and fix I need to ok through a uac account.

Give a try to various programs http://pcsupport.about.com/od/toolsofthetrade/tp/passrecovery.htm http://www.resetwindowspassword.com/recover-windows-7-password.html If you do not manage to recover password, then remove hdd from computer and backup data in anothe computer, and reinstall Windows 7. OR If you have backup copy, restore the latest backup copy. Regards Milos

Hi, Please understand that this issue is not related to User Account Controller. If we only can logon by using the guest account, we may need to reinstall the system to fix this issue. At this time, I would like to know why you cannot logon by using your original account. Which error message you encountered? In addition, you should ask your friend what he did. Kim Zhou TechNet Community Support