Besides being a terrible user experience, many programs do not work well with Windows UAC feature.
To disable the User Account Control (UAC) feature on a Windows Vista computer..
1. Launch MSCONFIG from the Run menu.
2. Click on the Tools tab.
3. Click on the line labeled “Disable UAP”
3. Press the Launch button.
4. A command window will open. When the command is done, just close the window.
5. You need to reboot the computer for changes to apply.
Note that you can re-enable UAC by selecting the “Enable UAP” line and then clicking on the Launch button.