Make User Account Control (UAC) Stop Blacking Out the Screen
In Windows Vista, the screen goes dark when the User Account Control window comes up, which is extremely annoying. They call it the “Secure Desktop”.
Note that this will make your system less secure before proceeding.
Windows Vista Business/Ultimate Users
Click on start > Setting > Control Panel > Administrative Tools> Local Security Policy:
In the Local Security Policy window, browse down to Local Policies \ Security Options
Over in the right hand part of the window, scroll down near the bottom and find the item titled “User Account Control: Switch to the secure desktop when prompting for elevation”. Double-click on it to open it up, then change it to disabled:
Source: Pc Tips For Khmer…