Run windows service with different priority

One can only change the priority of a ruing process in windows, however there is no direct way of changing the priority of a windows service that I know of. Of course it is possible to change the priority of the svchost.exe process that is executing the service, but this would also affect other services that are run by the same process.

My goal is to only run a specific windows-inteal service (Windows Update) with low priority (side question: why is this not the default???). I do not want to:

• do something manually
• clog down other operations on my system because of other affected services

I wondered whether I could schedule a task shortly after startup to change priority of the svchost.exe that hosts the Windows Update service. However I do not know how I would find out which PID corresponds to the correct service host process and I have conces about other processes being affected.