I have installed Silverlight (Product version 5.1.50428.0, File version 5.1.50428.0) on a Windows 7 PC. My target is to run the Silverlight application there in Internet Explorer 11. Whenever I start the application I see the dialog (Update or Run this time options). I know it can’t be updated anymore (as it is not supported by Microsoft anymore). If I press Run this time then it works OK. The problem is that I have to press it every time I start the program. We are running a similar Windows 7 PC in some other project where it does not ask for the same Silverlight version. There are many settings in Windows and hard to compare. I search on Google and somebody mentions to use the following command in the command line.

reg add “HKCUSoftwareMicrosoftWindowsCurrentVersionPoliciesExt” /v VersionCheckEnabled /t REG_DWORD /d 0 /f

My question, is it the right way or there are some other way? I am afraid that now it is working somehow but the registry update can stop the whole PC (with a wrong command).