If you have a workstation that failed to Windows Update with the error 0x80244022 from a WSUS, the fix is pretty simple and straightforward.
The reason why the error occurs is that the Application Pool that runs the WSUS service stopped.
Go to the WSUS server and open IIS Manager. Click Application Pools, select WsusPool, and click Start to restart the Application Pool.
Now, let’s try again on the workstation and see if the updates can go through.
The consequence of having this WsusPool application pool stopped is that you can’t access the WSUS dashboard on the WSUS server either, a Connection Error awaits you there instead.
If this happens often, it will delay your workstation/server update process. Better to address it now rather than later. As this post points out, to prevent WsusPool from being stopped, you will need to disable the Rapid-Fail Protection and increase the Private Memory Limit.
Where do I find these two settings?
Highlight the WsusPool in the IIS Application Pools window, and click the Advanced Settings… on the right side Actions pane.
Scroll down a bit towards the bottom of the list, change the Enabled setting for the Rapid-Fail Protection to False, and increase the Private Memory Limit to 3GB under the Recycling section.
Click OK to save the settings and restart the WsusPool.