PC not updating. Windows Update says it is up-to-date

Hi there

Last December I restored my C: partition using an image I had burnt in June 2015; I had done this procedure some times before with no problem at all; this time, after restoring, I shrank the C: partition from 289GB to 205GB, what still leaves 153GB of free space. The problem I have since is that Windows Update says the computer is up-to-date, when in fact the last downloaded updates are from June 2015.

I tried a Fixit from Microsoft, also the Fix WU from The Windows Club and a lot of other suggestions without any result. Can the partition size change be the cause of this? What can I do?

You seem to have already tried Fix WU and Windows Update Troubleshooter.

Run the built-in Disk Cleanup Tool to clear up disk space.

Delete the contents of the Software Distribution folder and try to install the updates.

Else see if something here Windows Update fail to install helps you.