Unbeknownst to me something has changed in my user account control settings. Like Minimoa who posted on 11/28/2009, I am unable to change my User Account Setting in Windows 7, even though I'm logged in as an administrator. When I click on "Change User Account Control Settings", absolutely nothing happens. If I log into a Guest account, clicking on "Change User Account Control Setting" brings up a dialog box asking for Admin password. I enter the admin password, then the dialog box disappears, and then nothing. I still cannot access the UAC settings. What do I do?