taskhostw.exe Time - High CPU

WmiPrvSe.exe is driving taskhostw.exe to use ~30% of CPU.  Some other 3rd party app is causing this but I would start by running a system file check.  It does not help that at the time of this trace you had 20 chrome tabs open and a tota; of 159 processes. (75 is normal) but  I think the SFC should tell us

Can you boot into safe mode and tell us if the problem exists in safe mode?  (to boot into safe mode use win key +"X>shutdown or log out>while holding the shift key down click restart)

Since SFC was clean I suspect it is one of the modern apps that is causing the issue

Some time passed after my post and I got some more info. These peeks happen once in a while, but when they happen it takes a long time with high CPU usage. What I do in these situations is I restart my PC and every time I get "Getting your PC ready" information, which gets me to the idea that it could be something with the Windows Updates maybe.

It is interesting to note that it is not only "Time" passed as parameter to taskhostw.exe that is causing the issue. Sometimes it is "Event" and other times there is nothing.

My laptop is Dell XPS 13 and I accidentally found another guy in the same situation as mine http://superuser.com/questions/973524/taskhostw-exe-constantly-high-cpu-after-windows-10-upgrade

Some further info shows that it is not related to Windows update - it is not every time that when I restart, I get the info about updates.

It is difficult to test in Safe Mode as the problem occurs "at some point", that is, not immediately when I start the PC.

My PC experience exactly the same thing... It is an ultrabook i7 with 8Gig ram and 256G SSD - model: HP Scetre 13 Pro

The problem occurs "at some point", that is, not immediately when I start the PC and once every several days. It started only after I've upgraded to Win 10. The Upgrade process went smooth and overall Win 10 seems much better than Win 8 - HOWEVER:

My premium ultrabook became useless with this problem. It used to run for 8.5 hours on battery - now, while the [taskhostw.exe] process runs and eats up ~40% CPU, it drains the battery completely in less than 2 hours and you can fry an egg on the bottom aluminum shell...

I'm having the same issue.  I'm on Windows 10, build 10586.104:

http://screencast.com/t/I0ya0Eoh

It's been happening for a couple of weeks now.  The full command line for me is "taskhostw.exe Event" and the process consumes an entire core on my Dell XPS 12 (9Q23):

http://screencast.com/t/GhpAIU1c

It looks like a single thread is in a very tight loop:

http://screencast.com/t/6hFga7BNd1kX

You can see, there are no 3rd party involved.  Only MSFT DLLs are in the stack:

http://screencast.com/t/bf91VUTc

I can't kill or even lower the process priority.  I have to leave my laptop plugged in while in use or the battery will die.  The fan is going all the time to try to keep things cool and the laptop is really sluggish.