The Silverlight is Version 5.1.30514.0, and the Canon Image Browser EX is 1..4.0. My OS is Vista (32-bit). Following your letter I have removed and reinstalled, fist, ImageBrowser, then, Silverlight, shutting down and rebooting after each step. The result is the same as it was before.
I've tried what you suggest, but there is no change: ImageBrowser opens to the 80% stage and, after a minute, it says that Silverline may not be installed properly.
Perhaps I should write to Canon