Hey Ed.
Yeah I get that.
What I'm saying is it looks like its the way W7 interacts with svchost that is a problem on some hardware.
So I patch etc, reboot & its all OK, cpu initial boost fades & everything looks OK. Then e.g. I open the browser & bang 100% from 12%. (the browser is fully updated & what it is IE, Chrome etc doesn't make a difference).
Look at the procs list & there is
svchost (netsvcs) at the top again.
Close the browser & svchost (netsvcs) is still at max, & will stay there until halted manually.
Same occurs with any of the procs in the above screen. Stuff like BITS which I don't need are disabled in services.msc.
So I am currently left with the issue of having to manually stop services depending on what I do.
I am nonetheless
still trying 
to find a combo of allowed procs that works but I am also seeing commentary to the effect that I am p_ssing into the wind as its something that needs a core M$ patch.
If I figure it out I'll post my findings.