Please keep in mind I am not anywhere an expert on this type of stuff.
But it seems like the Background Intelligence Transfer Service (BITS) is unable to find a job to complete a prior download. The log seems to show that you have 8 downloads waiting to be completed. The
80200001 code seems to be saying Windows cannot find those download jobs. I will assume you have a good internet connection and slow traffic is not the problem.
There is also an error code associated with the SP1 update of 0x800f0826. This might mean several things, like it can't install because a prior update did not install. But there is another possibility discussed in both of the links below. You might check to see if anything rings a bell...