This situation started a few months ago.
When ever new updates emerge, they stuck at pending install, forever (I usually don't turn off my PC at all for days). In the mean time, my system start to be hogged by a process called the svhcost.exe (netsvc-p) which takes half my CPU and my disk activity alike.
Windows 10 Pro 1803 OS build 17134.472 under domain environment. Update is automatically approved by WSUS.
I have a PC at home which auto updates just fine but most computer in my domain that are 1803, has this hiccup.
The process keeps reading the files I do not know detail of. But apparently it's related to Windows Update.
In the mean time the system get laggy coz all the CPU eaten up. The settings windows is ridiculously slow in response and often shows up white. Until I finally I found out that I can go to "Advanced options" and flip the option "Allow metered network". After I flip the options, update start to show 0% and then start installing.
Mind this: I need to FLIP this option every time new updates come and the system is acting up. Letting it stay on or off just do not make a different.
Does any one experience this? I can't think of a valid explanation.