WSUS update not showing up

This could be several things. I've seen updates unpredictably break WSUS clients, for example. I don't think I've seen a client incorrectly report no updates, however, except when there was a prerequisite update missing.

It looks like you already checked the registry keys, so I'll skip past that.

So I'm going to recommend:

• Check for any "prerequisite" update.
• The \Windows\SoftwareDistribution directory can get corrupted. Renaming or deleting the folder and running wuauclt /detectnow should help, if so.
• Microsoft has a list of dlls you can try reregistering, etc., here:
  http://support.microsoft.com/kb/555989

I hope that helps. Good luck!

I had a similar problem recently with a new WSUS, I tried the same minimal settings as you but because it already downloaded updates I had to search for all Server2003, XP, & old office version updates, Declined them, then ran WSUS Cleanup wizard again, this cleared about 60 gigs. I also searched for all updates and SP's which we don't need and declined them. Got it down to 70gig with only Win7,Office2010 & Server 2012 R2 selected, Critical and security auto approved. as soon as you add Windows 8.x & office2013 it increases dramatically!