How to make Unlocker work on Windows Vista? You need to deactivate UAC globally for the whole system or locally just for Unlocker. Globally, go to "Control Panel" then "User Accounts" then again "User Accounts" then "Turn User Account Control" and set it to Off, then restart your computer. Locally go to the Unlocker install directory (usually C:/Program Files/Unlocker), right-click Unlocker.exe, select Properties, and on the "Compatibility" tab, under "Priviledge Level" enable "Run this program as administrator". Click "allow" everytime you will get the UAC prompt to ask if you want to run Unlocker. Thanks to Mike Cerminara for his help.
However, my computer already had User Account Control turned off, and when I tried to change the properties of unlocker by clicking the tab in the "compatibility" section that said "Run this program as administrator" but it was greyed out and I couldn't click it.
Can anyone help me with this please?