Upgraded customer from Standard 2015 to Advanced 2018. 1 user ""A"" is getting an Error when logging into Sage: Error: ""Sage.ERP100.Launcher.Bootstrap has stopped working"". It seems to be a Windows User Specific error. If User A logs into his own machine and then into Sage, he gets error. If User B logs into same machine (windows), User A can log into Sage successfully. If User A logs into another machine (windows), and then into Sage, he gets the error. Nobody is admin on their local machines and UAC is turned on high. IT is hesitant to create a new windows profile, something to do with Office 365? Resolution is to replace Launcher.Old.Exe if missing and if machine specific to do a repair on .Net (which I did). Any other ideas out there? These are Window 7 machines. .Net is 4.7.2. I uninstalled wksetup, turned off UAC (under my admin profile) and installed wksetup again, no change.