Logjam with XP updates

[Polock]

I'm down to my last system to install the SP2 update and as the old saying goes, "I've saved the best for last".I need to clear the logjam I have before I try the SP2 update, but I'm lost with the way the new v5 updater works and where it puts the downloads. If I run Windows update and check the Details of the download,it shows Update for Background Intelligent Transfer Service (BITS) 2.0 and WinHTTP 5.1 (KB842773) with the Total size of 0 KB and 0 minutes to download.If I click on install, a window happily tells me the "Updates were unable to be successfully installed".This all started back last summer when I updated to the v5 updater when it was in the beta stage and I've been looking for cures ever since.What I would like to try is removing all the downloaded, or attempted downloaded, updates, just in case any were corrupt...but where are they downloaded too? I found a folder called SoftwareDistribution under C:\Windows, but am hesitant in deleting it's contents without a thorough understanding of what's what.Part 2 of what I would like to try, is remove the v5 beta updater I had installed and replace with the current version of v5. Can that be deleted from the Downloaded Program Files folder?Being somewhat of a novice, I really appreciate any and all guidance.Polock