https://techcommunity.microsoft.com/t5/configuration-manager-archive/high-cpu-high-memory-in-wsus-following-update-tuesdays/ba-p/274265Конкретно часть:
Increase the
ASP.NET timeout
Make a copy of \Program Files\Update Services\WebServices\ClientWebService\Web.Config.
Open \Program Files\Update Services\WebServices\ClientWebService\Web.Config.
Find the element “<httpRunTime”. It will look like this (in an unmodified web.config):
<httpRuntime maxRequestLength="4096" />
Modify httpRunTime by adding an executionTimeout attribute:
<httpRuntime maxRequestLength="4096" executionTimeout="3600" />
Save the web.config to a different location and copy the modified one into the directory.
From an elevated command prompt, run IISReset to restart IIS.