CPU usage very high - Service Host: Local Service (No Network) (4) since latest Windows updates

Hi, Jed.

Thank you for posting your query in Microsoft Community. We in Community will try to resolve your issue the best way we can.

I would suggest that you try the methods mentioned below and check if you can resolve the issue:

Method 1: System File Checker is a utility in Windows that allows users to scan for corruptions in Windows system files and restore corrupted files.

To perform SFC Scan, refer to the below link:

https://support.microsoft.com/en-us/kb/929833

Note: Steps mentioned for Windows 8/8.1, will work fine with Windows 10.

Method 2: Run DISM Commands:

1) Press Windows + x on your keyboard.

2) Select Command prompt (Admin) to open Administrator Command Prompt .

3) In the Administrator: Command Prompt window, type the following commands. Press the Enter key after each command:

     dism.exe /online /cleanup-image /scanhealth
     dism.exe /online /cleanup-image /restorehealth

Hope this information helps. Do revert back to us with the outcome, so that we can assist you further

I'm having the same problem.

Unfortunately, I can't open the start menu either. The search box in the task tray won't accept input and I can't open Edge. I can select File Explorer and other apps in the task bar, just not edge. I can't open the start screen using the Windows Key, nor can I open it with the mouse.

I tried using an external Bluetooth keyboard/mouse but same problem.

Open cmd as admin, by clicking start+x then command prompt(Admin).

run this command "sfc scannow".

It may help you.

Well, FFS, I come into work this morning, dock my Surface, and in a few minutes the fans are going wild again. Open up Task Manager, and the same Service Host: Local Service (No Network) (4) is using 50% CPU again. If I'm lucky it'll steal the first day and a half of my work week from me again.

Need a fix for this NOW NOW NOW Microsoft.

Hi,

Welcome to Microsoft Community and thank you for your interest in Windows 10.

I suggest you to remove unnecessary external device (not mouse and keyboard) before starting your system in safe mode.

To start your system in safe mode follow the below steps:

1. Press and hold Shift key and restart your Computer.
2. Select Troubleshoot.
3. Select Advance Option.
4. Select Startup Repair.
5. Follow the on Screen instruction.

For more information refer to the below link:

http://windows.microsoft.com/en-us/windows/user-accounts-faq#1TC=windows-8

Note:Applies to Windows 10 also.

After starting your system your system in Safe Mode let’s perform Clean Boot and check if it helps.

A clean boot is performed to start Windows by using a minimal set of drivers and startup programs. This helps eliminate software conflicts that occur when you install a program or an update or when you run a program in Windows 8.1, Windows 8, Windows 7, or Windows Vista. You may also troubleshoot or determine what conflict is causing the problem by performing a clean boot.

Please refer the steps given in the link below to perform a Clean Boot:

https://support.microsoft.com/en-us/kb/929135?ppud=4&wa=wsignin1.0

Note: Please go through the section: How to reset the computer to start as usual after troubleshooting with clean boot of the Kb article to boot the computer in normal startup after fixing the issue.

Hope it helps, reply to us with the status of your issue. We will be happy to assist you.