Update 
Microsoft Windows Update
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Error when you download updates using Windows Update or Microsoft Update: 8000FFFF
When you trying to update Windows update (so you can proceed with the Service Packe installation) this error 8000FFFF appears. -
Error when you download updates using Windows Update or Microsoft Update: 80070426
When you trying to update Windows update (so you can proceed with the Service Packe installation) this error 80070426 appears.