User Permissions
The majority of installation/update problems are resolved by running the installer while logged in as the PC’s local administrator account or as a domain administrator for network setups.
If an installation fails to complete successfully, in the first instance try right-clicking on the file and choosing the option “Run as administrator”. If this still fails to complete you may need to refer to your IT support to either run the update on your behalf or assign your PC user account sufficient permission to run the installer.