User Access Control introduced in Windows Vista is enabled by default in Windows 7 and Windows 2008 Server. UAC provides us a layer of security to prevent unauthorized changes from being made to the workstations/servers. Whenever a user or an application attempts to perform an operation that involves changing system configuration which will affect the operating system and/or other users, UAC will prompt for permissions before allowing the operation. This will ensure only authorized changes are made and also prevents malicious softwares from making changes to the operating system. Though this can be considered a nice securtiy feature it is quite annoying for System Administrators and for power users who knows what they are doing.

Warning: Disabling UAC reduces system security. Do not do it unless you know what you are doing.

There multiple ways to disable UAC in Windows 7 and Windows 2008.

The GUI way:

1. Open Control Panel and click User Accounts.
2. Click User Account Control Settings.

3. The slider gives us four options starting from Always Notify to Never Notify.
Pull the slider all the way down to disable UAC and click OK.

From Command ine:

UAC can be easily disabled in the registry giving us an option to do it from command prompt.

1. Right-click CMD and click Runas Administrator.
2. To disable run the command show below

3. To enable

4. Reboot the machine for the registry settings to take effect.