Windows Update stuck on Checking for Updates: solve the problem with WSUS

If on Windows should happen that Windows Update search the updates forever, remaining stuck on "Checking for Updates" the simplest way to solve the problem is using WSUS Offline Update.

Browsing the web for this problem a lot of people advise to install some packet or some patch, I tried everything and for me the only solution has been using WSUS Offline Update to search and install the missing updates.

After having updated Windows with WSUS Offline Update, also Windows Update has resumed to work.