I finally gave up on Silverlight and removed it last week. And it has just struck me that my computer seems to be working a lot better without it. Normally it keeps pestering you to download it again but so far no sign of that.
I had two failed attempts by my computer to download these 3 updates automatically at shut down. It seemed to shut down OK, but when rebooting, I received a screen message that W7 was configuring the updates but it stayed at 0% complete for about 5 minutes and then booted into windows without completing the updates.
In the end, I downloaded them manually and that seems to have worked.
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