In Windows Vista start off by going into the control panel in the start menu. In here go into "user accounts and family safety". Inside go into "user accounts". A screen will appear where you can make changes to your user account. Here there should be an option to turn user account control on or off. Click on this will bring up another window where if you uncheck the solitary checkbox you will have succeeded in turning User Account Control off. After doing so click ok and then press restart now when prompted. The next time the computer starts up User Account Control will no longer be enabled.