The reason behind this irritating problem is a little bit funny!Actually Microsoft has released a few updates for the Windows Update client program.Immediately a list of over 100 updates appeared, and I was successful in downloading all of them.Your suggestion is the simplest of the suggested fixes. using a brand new fresh install of win 7 sp 1 64bit.When I booted up - wonder of wonders, it immediately found all the updates and it downloaded and (eventually) installed over 200. I had the same problem - when I tried to get a list of Windows 7 updates on my Acer netbook PC with a wireless internet connection, it just sat there for hours without providing the list of updates.I had had no problems getting onto the internet with the wifi adapter and it seems to still be working just fine on multiple machines for all sorts of other internet tasks. But then I tried your suggestion of directly connecting your computer to an Ethernet cable (rather than wireless). I took the Ethernet cable from my modem, disconnected it from my desktop (i Mac), and reconnected it to my netbook.
To be able to install the update you first need to install the April 2015 servicing stack update for Windows 7 and Windows Server 2008 R2 update (again, stop WU service before trying to install the MSU).
It’s the easiest method to try, so go ahead and run it first.
The troubleshooter performs three actions: To run the troubleshooter, hit Start, search for “troubleshooting,” and then run the selection that search comes up with.
I recently had the same problem and solved it by shutting down windows and then restarting it. Only at shutdown it started installing updates and then the next boot it found the next set up updates.
Neither magicandre1981 nor Moab's answers assisted me.