Microsoft Silverlight patch goofy

By Selwyn Polit, 25 August, 2021

Well Microsoft started pushing an update to Silverlight - updating it to version 2.0.40115.0 (40115? what are they thinking?)  Of course it wouldn't install and there was no apparent way to uninstall the old version of silverlight.  I tried even installing the new version right over the old but that failed also.  So I dug around and tried some stuff. 

Basically it involved downloading an old utilitiy from Microsoft that I had never discovered before.  TheWindows Installer Cleanup Utility.

I installed it and it presented a list of apps to uninstall.  I selected the old Microsoft Silverlight and it was gone.  I ran Ccleaner ( to clean up any registry stuff and then installed the new Silverlight 2 from Microsoft's site at

That worked fine.  btw I also saw a procedure to fix this problem which involved uninstalling Quicken.  That seemed a little extreme to me.

This procedure is also nicely described at