You will need to make sure that the User Access Control is switched off before you start the upgrade.
To turn off User Account Control:
|1.||Open the control panel and click User Accounts.|
|2.||Click User Accounts.|
|3.||Click Change User Account Control settings.|
|4.||The User Account Control Settings window opens|
|1.||Move the slider to select Never Notify.|
|2.||Click OK to save the change.|