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Many Windows users have suffered from a problem where up to 95% of their CPU or/and Disk have been used by a process known as System Host: Local System (Network Restricted).

  1. This site uses cookies and other tacking technologies to assist with navigation and your ability to provide feedback, analyze your use of our products and services, assist with our promotional and marketing efforts, and provide content from third parties.
  2. Mar 15, 2018 Back when Windows 10 Creators Update was released there was a spate of issues where the Windows Service Host would utilize a lot of CPU and/or RAM. This was a temporary issue as Microsoft then released a hotfix to.
I will tell you in this post how to fix the issue manually and how to clean it automatically using a special powerful removal tool. You can download the removal program for free here:

Manual removal instructions:

What is SYSHOSTSIHOST.EXE?

SYSHOSTSIHOST.EXE is a pretty popular virus.
SYSHOSTSIHOST.EXE detected as TROJ.SIHOST.
You can get it on your computer while downloading it bundled with some free software.
Sadly, most free downloads do not disclose that other programs will be installed, so you are more likely to get SYSHOSTSIHOST.EXE on your PC without your own knowledge.

After being downloaded, SYSHOSTSIHOST.EXE hijacks your browser and changes search settings.
SYSHOSTSIHOST.EXE also causes an appearance of popup ads and browser redirecting.

SYSHOSTSIHOST.EXE is very annoying and hard to get rid of.

Technical Information:

  • Full path on a computer= %APPDATA%SYSHOSTSIHOST.EXE

You have 2 ways to remove SYSHOSTSIHOST.EXE:


Why I recommend you to use an automatic way?

  1. You know only one virus name: 'SYSHOSTSIHOST.EXE', but usually you have infected by a bunch of viruses.
    The UnHackMe program detects this threat and all others.
  2. UnHackMe is quite fast! You need only 5 minutes to check your PC.
  3. UnHackMe uses the special features to remove hard in removal viruses. If you remove a virus manually, it can prevent deleting using a self-protecting module. If you even delete the virus, it may recreate himself by a stealthy module.
  4. UnHackMe is small and compatible with any antivirus.
  5. UnHackMe is fully free for 30-days!

Here’s how to remove SYSHOSTSIHOST.EXE virus automatically:

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So it was much easier to fix such problem automatically, wasn't it?
That is why I strongly advise you to use UnHackMe for remove SYSHOSTSIHOST.EXE redirect or other unwanted software.

How to remove SYSHOSTSIHOST.EXE manually:

STEP 1: Check all shortcuts of your browsers on your desktop, taskbar and in the Start menu. Right click on your shortcut and change it's properties.

You can see SYSHOSTSIHOST.EXE or another web site at the end of shortcut target (command line). Remove it and save changes.

In addition, check this command line for fake browser's trick.
For example, if a shortcut points to Google Chrome, it must have the path:
C:Program Files (x86)GoogleChromeApplicationchrome.exe.
Fake browser may be: …AppdataRoamingHPReyosReyosStarter3.exe.
Also the file name may be: “chromium.exe” instead of chrome.exe.

STEP 2: Investigate the list of installed programs and uninstall all unknown recently installed programs.

STEP 3: Open Task Manager and close all processes, related to SYSHOSTSIHOST.EXE in their description. Discover the directories where such processes start. Search for random or strange file names.

Remove SYSHOSTSIHOST.EXE virus from running processes

STEP 4: Inspect the Windows services. Press Win+R, type in: services.msc and press OK.

Remove SYSHOSTSIHOST.EXE virus from Windows services

Disable the services with random names or contains SYSHOSTSIHOST.EXE in it's name or description.

STEP 5: After that press Win+R, type in: taskschd.msc and press OK to open Windows Task Scheduler.

Delete any task related to SYSHOSTSIHOST.EXE. Disable unknown tasks with random names.

STEP 6: Clear the Windows registry from SYSHOSTSIHOST.EXE virus.
Press Win+R, type in: regedit.exe and press OK.

Remove SYSHOSTSIHOST.EXE virus from Windows registry

Find and delete all keys/values contains SYSHOSTSIHOST.EXE.

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STEP 7: Remove SYSHOSTSIHOST.EXE from Google Chrome.

STEP 8: Remove SYSHOSTSIHOST.EXE from Internet Explorer.

STEP 9: Remove SYSHOSTSIHOST.EXE from Mozilla Firefox.

Change Firefox Home Page

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STEP 10: And at the end, clear your basket, temporal files, browser's cache.

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But if you miss any of these steps and only one part of virus remains – it will come back again immediately or after reboot.

Remove it now!Syshost

Recommended: UnHackMe anti-rootkit and anti-malware
Premium software: RegRun Security Suite (Good choice for removal and protection)

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