I don't know, but one possibility is an infection. AFAIK there's no "secsvc" in Windows - although there is a "secsvcs
" - that's the service name for Windows Defender when running under svchost.exe
Download and install this free program from Microsoft: Process Explorer
Locate the PID of the svchost.exe process that's sucking up all the memory (in your Resource Monitor)
Then open up the new program (named Process Explorer) and hover the mouse over the instance of svchost.exe with the same PID. Let us know what it says.
Then, right click on the svchost.exe process and select Properties.
Then select the Threads tab
In the Threads tab, let us know the Start Address (everything before the !) for anything that shows a number under Cycles Delta