1. Hide the update, then...
2. Uninstall Silverlight & reboot, then do a clean install of the current version via
How to clean a corrupted Silverlight installation and then reinstall Silverlight
Need more help? Post here:
In reply to PA Bear MS MVP's post on January 25, 2010
Unfortunately I can't uninstall it either. It keeps telling me installation source not found. Actually I would be happy just to scrub it from my computer instead of upgrading, but I can't.
In reply to JulianHawkins's post on February 7, 2014