Every service pack sort of defines a new platform for which updates start to accumulate anew.
In another answer of mine, I have explained that Windows Update constructs in memory a tree of all the updates which could apply to a computer, then prunes it with a view to the updates already installed on the computer, to finally arrive at the set of updates that need to be installed and the order of installation.
The time taken for this brute-force process is a function of the total number of updates available for this platform, since the last service pack.
I think that some combination of factors has enormously increased the time that Windows Update takes to download and prune its update tree. You might gain more information on the problem by watching Windows Update while it is working, as regarding memory usage, network activity and disk access.
Installing the convenience rollup for Windows 7 SP1 is the only way I can think of to cut this Gordian Knot of Windows Update on the affected computers.
Then, go to C:\Windows\Software Distribution\Download and delete everything in the folder. Finally, open the CLI, type This is not a permanent fix but if there's a particular update you need asap and don't have time to sort out something permanent at the moment you can use. Then sort out a permanent fix when you have the time. This is really a comment and not an answer to the original question.
https://catalog.update.microsoft.com/ You need to use IE. To critique or request clarification from an author, leave a comment below their post - you can always comment on your own posts, and once you have sufficient reputation you will be able to comment on any post.Maybe updating your system this way gets rid of the bug causing it.Windows update is just a piece of crap sometimes (sorry for the wording), so this could fix it.In a very short amount of time, Microsoft is switching to monthly cumulative updates for Windows 7 and Windows 8.1 similar to what happens with Windows 10.that sound like solutions I've used in the past to resolve correlated problems even if not exactly the same.Windows 7 SP1 came out on February 22, 2011, more than 5 years ago, and since then the number of updates has grown enormously.