How to turn off Windows Vista/Windows 7, 8, and 10 UAC (User Account Control)
|Knowledge Article Number||000019209|
Sometimes users are unable to install Salesforce for Outlook successfully or receive error messages during the installation. Also they may experience some sync issues or weird behavior such as sync getting stuck on 0% or messages such as unable to communicate with Outlook and so on.
You may need to disable this feature in Windows and restart your machine and then reinstall the Salesforce plug-in
To disable the UAC in Windows Vista, do the following.
1. Go to "Start" and type "MSCONFIG" and press enter on your keyboard. It is also possible to use the Windows and R key combination on your keyboard to bring up the "RUN" box and type in "MSCONFIG"
To disable the UAC in Windows 7, Windows 8.x, and Windows 10 do the following.
1. Click on the Start button to open the Start menu and type in UAC in the search box and you should see the "Change User Account Control Settings" popping up.
Above screen shot is from a Windows 10 machine
Verify UAC is turned off
To make sure the UAC is turned off you need to check the following Windows Registry key and make sure over on the right-hand side, the value for EnableLUA is 0. If not double click on it and change to 0 and restart the computer
The steps above are the simplest way to modify the UAC but there are also other ways to change this setting as well. Please refer to the following 2 links by Microsoft