A process called Service Host: Local System is using up all of my laptops resources

My laptop has been running very slowly for the past few days which is weird because my laptop is quite powerful and has always run very fast. I looked at my task manager and saw that a process called Service Host: Local System was using up almost all of my RAM. I am running Windows 8 Pro on a Sony VAIO S13P. What can I do to fix this problem?

If your on Windows 10 go Windows update, your computer is most likely downloading an update and getting ready to install. Windows 10 automatically does this. It can slow Cpu, networking, memory, and disk. Get the updates done and you will be fine (until they roll out more updates)

Method 2  actually did the trick for me it was awesome. Thank you.

I want to report a similar problem also, except in my case it is using up my cpu resources. My laptop is pretty fast however this set of services (UPnP Device Host, Time Broker, SSDP Discovery and Function Discovery Resource Publication) all under the Service Host: Local Service (No Impersonation) (4), uses up 64 percent of my CPU. I first realize this problem because i could hear my fan running at really high speed even when all my apps were closed.

This issue only started recently in the past month and though I cannot pinpoint the exact date, I can saw that I did install the latest MS updates for windows 8 in the last month. Also it seems to do this whenever I run an internet app (can't say for sure) but even after the app is close it continues to run until i manually stop the service.

Btw: I have a Dell SXPS w/ Window 8 pro (manually installed)

I have a similar problem to this running on a dell inspiron 15 rwith windows 8 installed and very high cpu usage 97%!

Thanks of all the info provided in the forum.

What worked for me was the following steps:

1. started task manager on the performance tab
2. Started shutting down each app one by one and waiting for system to stabilise after each
3. Found that it was Windows media player playing an unknown album.
4. Shut down windows media player and cpu dropped immediately and also my network (wifi) reduced dramatically.
5. managed to reproduce this again.

Hope that helps and good luck.

WOW!  Seem that is true,  just disabling Windows Update  services    save me  20% of the RAM memory (though this machine only has 4 GB). 

So are you going to remember to manually initiate windows update every week?

Tbh, what i thnk is happening is that... when your computer goes to sleep it dumps the RAM  because the ram is volatile. therefoe the contents of the memory are temporarly stored in the disk In addittion to that it has to share the cpu time with other processes when resuming from sleep mode to restore the RAM. YOU HAVE EITHER very large RAM, SLOW CPU, or many programs competing for time.