The UAC is a security feature in Windows Vista, Windows 7, Windows 8 and Windows 10 which helps prevent unauthorized changes to your computer. When the UAC is on you will get a prompt to authorize the changes. This prompt does not work for background processes therefore the changes are automatically denied by the UAC. In order for Sage Pastel and Pervasive to register correctly and apply the database licenses you will need to ensure that the Windows User Account Control or UAC has been turned off. The reason the UAC needs to be turned off is that during registration the licenses for the Pervasive database are applied in the background. 1. How to turn off the User Account Control in Windows Vista 2. How to turn off the User Account Control in Windows 7 3. How to turn off the User Account Control in Windows 8 and Windows 10 Go to Start| Control Panel In the search type in UAC and press ‘Enter’ on your keyboard Click on the option ‘Turn user Account Control (UAC) on or off’ The ‘Turn on User Account Control (UAC) to make your computer more secure’ screen will display Ensure the option Use User Account Control (UAC) to help protect your computer is not ticked Go to Start| Control Panel In the search type in UAC and press ‘Enter’ on your keyboard Click on the option ‘Change User Account Control Settings’ The ‘User Account Control Settings’ screen will display Ensure the slider is at the bottom on Never notify Click the Start button Search for UAC Select the option Change User Account Control settings The ‘User Account Control Settings’ screen will display Ensure the slider is at the bottom on Never notify .