Unable to add new code to Web Server (Where the GP Web Client is setup)

 When adding a new product to the Web Server you may experience the following error "Privilege error" unable to install new code. 

This is because although, everyone is logged out of GP, there are stranded Web Client Sessions. 

To end these, go to task manager and end the processes as follows: "Microsoft.Dynamics.GP.Web.Services.Runtime.Process (32 bit)"