Server Configuration > Service Packs and HotFixes > HotFix Permissions
  
HotFix Permissions
For users to download and install HotFixes, they must have the Download permission. By default, the Download permission is allowed for the everyone group. This setting does not generally need to be changed.
If the Download permission is not granted to a user, that user can continue to use the Windchill RV&S client but cannot update their client with an available HotFix.