How to go deeper than "access to this memory location is invalid"

[Glem2929]

Hi, it's perhaps a Windows beginner's question, sorry for that.
I'm trying to identify why WUDFCompanionHost.exe is causing constant CPU usage on a W11 24H2
With SystemInformer tool i can't acces any informations in the environment tab to show what is the ActiveDevice behind this

What is the meaning of "access to this memory location is invalid" ?
In the same way, i'm unable to dump the memory image of the process with taskmgr

[MagicAndre1981]

you should use ETW in form of Windows Performance Toolkit (wprui.exe to capture the data

and WPA.exe to analyze the CPU usage). Tools like SI and ProcExp only show snapshots of the stack, WPR sums this up to see which functions are called often.