Research – How to Remove HKU\S-1-5-21 Virus? (March 2019)

What is HKU\S-1-5-21 Virus

HKU\S-1-5-21 Virus is identified as a severe Trojan Horse that helps spyware and malware enter your system to make you to pay money It is spread via spam email attachments, porn sites and malicious third-party program and . It is connected with adware and hijacker which hijack your browser and cause annoying pop-up advertisements on browsers.

HKUS-1-5-21 Virus

The longer HKU\S-1-5-21 Virus stays in the computer, the more problem would be aroused. More severely, it can violate your privacy to get sensitive information. HKU\S-1-5-21 Virus keeps track of your internet habit so that it can invade your accounts. Besides, HKU\S-1-5-21 Virus virus may download additional threats and installs a lot of unwanted applications. So it is not surprised that computer acts wired and performs in a slow speed. You should take action to remove it as quickly as you can.

Problems Caused by HKU\S-1-5-21 Virus

        • It may transfer more threats to cause more malfunctions;
        • It eats up space in hard drive by generating junk files;
        • It and bundled viruses highly consume CPU to slow down system running and even crashing;
        • It helps cyber criminal invades your PC and collect your personal or sensitive information silently;
        • It display scam message to cheat you to pay money on unwanted service or products;
        • It helps adware to display banner ads, pop-up ads and in-text ads on almost each website you visit.

How to remove HKU\S-1-5-21 VIRUS From Windows OS?

(If have HKU\S-1-5-21 Virus or other virus on Mac OS, Please Use Guide – How to Remove Virus & Malware From Mac. )


NOTESome operations in the removal process may require you to exit this page or restart computer, Please Bookmark This Page first For later reference.

Step 1. Try to find out and end the dangerous processes run by HKU\S-1-5-21 Virus or other threat.

Step 2. Uninstall HKU\S-1-5-21 Virus related apps or other dangerous programs from Control Panel

Step 3. Delete HKU\S-1-5-21 Virus and related extension Adware / Hijacker from Web Browsers

Step 4. Try to Find out and Remove HKU\S-1-5-21 Virus related files or other malicious files from Regidit Editor

Step 5. Download Professional Anti-malware Tool to Check Entire Computer (Important!)


Step 1. Try to find out and end the dangerous processes run by HKU\S-1-5-21 Virus or other threat.

– Press CTRL + SHIFT + ESC keys at the same time to open the Processes Tab in Windows Task Manager:

open task manager

Try to find out the dangerous processes run by HKU\S-1-5-21 Virus other malware according to the CPU Usage and the name of its Decryption:

If a suspicious process is from unknown third party company, meanwhile it is causing High CPU Usage, then this process may be the dangerous process of malware.

delete HKU\S-1-5-21 Virus

If you are able determine that which processes are dangerous, you can select them and click End Process one by one:

HKU\S-1-5-21 Virus uninstall process

If you are not able to determine the dangerous processes, don’t end any process, because there may be some risks of damaging your computer if you make mistakes. In such situation, we suggest you directly try the professional anti-malware tool in Step 5 and see if it can find out all dangerous items for you.


Step 2. Uninstall HKU\S-1-5-21 Virus related apps or other dangerous programs from Control Panel.

– Press Win + R keys at the same time to open the “Run” window >> Then type appwiz.cpl and click OK :

uninstall HKU\S-1-5-21 Virus

HKU\S-1-5-21 VIRUS uninstall process

– Now you can see the program list of Control Panel, please check the list and look for dangerous app or suspicious app may be related with HKU\S-1-5-21 Virus. Once you determine the unsafe apps, select them and click Uninstall:

HKU\S-1-5-21 Virus removal way

Note – If any malware cannot be uninstalled from Control Panel, please go to Step 5 and try the professional removal tool, which may help you uninstall all stubborn apps with ease.


Step 3. Delete HKU\S-1-5-21 Virus and related extension Adware / Hijacker from web browsers.

NOTESome operations in the removal process may require you to exit this page or turn off web browser, Please Bookmark This Page first For later reference.

Edge

Remove Browser Hijacker from Microsoft Edge

1. Change Edge’s default search engine to Google Search:

Open Microsoft Edge >> Click the menu button (the button with three dots) at the top-right corner >> Select “Settings” in the menu.

delete HKU\S-1-5-21 Virus from edge

In the “Settings” panel >> Scroll down to Advanced settings and click the “View advanced settings” button.

uninstall HKU\S-1-5-21 Virus from edge

In the “Advanced settings” panel >> Scroll down to the “Search in the address bar with” setting >> Click the “Change search engine” button.

eliminate HKU\S-1-5-21 Virus from edge

In the “Change search engine”>> Select Google Search and click “Set as Default”.

remove HKU\S-1-5-21 Virus from edge

 

2. Change your Homepage on Edge:

– Open Microsoft Edge >> Click the three-dotted menu at the upper-right corner of the windows >> choose Settings.

– Under the Open Microsoft Edge with option >> Choose A specific page or pages from the menu >> Enter a URL into that box and click the save button off to the right.

remove HKU\S-1-5-21 Virus from edge homepage

Chrome

Remove Adware Extension and Hijacker from Google Chrome

1. Delete unsafe or unwanted extension from Chrome:

– Click Chrome menu → select Tools.

remove HKU\S-1-5-21 Virus from chrome

– Then click Extension >> Select HKU\S-1-5-21 VIRUS or unwanted extensions → click on Trash bin >> Click Remove

delete HKU\S-1-5-21 Virus from chrome

2. Change your Homepage on Chrome:

Click Chrome menu >> Select Settings ;

Within Settings, in the Appearance section, check the box next to Show Home button;

Click Change next to the address shown below the Show Home Button;

In the window under New Tab Page >> Type in the web address of the page you like to set as your homepage >> Click OK

remove HKU\S-1-5-21 Virus from chrome hoempage

3. Change your default Search Engine on Chrome:

– Click Chrome menu >> Select Settings ;

– Within Settings, in the Search engine section >> click Manage search engines…

Choose the search provider you want to make as the default and then click Make default;

– Click Done.

Firefox

Delete Adware Add-on and Hijacker from Mozilla Firefox

1. Delete unsafe or unwanted extension from Firefox:

– Go to Firefox menu and click on Tools >> Select Add-ons

delete HKU\S-1-5-21 Virus from firefox

– Select HKU\S-1-5-21 VIRUS unwanted extensions and add-ons >> Click Disable or Remove button to remove it.

uninstall HKU\S-1-5-21 Virus from firefox

2. Change your Homepage on Firefox:

– Click the menu button and choose Options >> Click the Home panel.

– Click the menu next to Homepage and new windows and choose “enter your own URLs” >> Type in the page you want to set.

3. Change your default Search Engine on Firefox:

– Click the menu button and choose Options

– Click on “Search” >> Choose your preferred Search Engine from the “Default Search Engine” drop down menu.

Internet Explorer

Delete Adware Add-on and Hijacker from Internet Explorer

1. Delete unsafe or unwanted add-on from IE:

– Click on Tools >> go to Manage Add-ons

uninstall HKU\S-1-5-21 Virus from IE

– In Toolbars and Extensions >> Choose HKU\S-1-5-21 VIRUS or unwanted extensions and add-ons → Click Disable button

DELETE HKU\S-1-5-21 Virus from IE

2. Change your Homepage on IE:

– Click Tools in the upper-right corner >> Select Internet Options.- Under the General tab, type the URL of the web page you want to set.- Click Apply >> Click Ok.

3. Change your default Search Engine on IE:

– Open Internet Explorer >> click the gear icon >>Click Manage add-ons >> Click Search Providers.

– Now you will see those which are already present on IE. Right-click the one you want to set as your search engine >> select Set as default.

REMOVE HKU\S-1-5-21 Virus hijacker from IE

NOTE – If the above operations cannot remove some stubborn adware or hijacker from browsers, please go to Step 5 and have a try with the Automatic Removal Tool, which is a professional anti-malware capable of removing latest adware and hijacker.


Step 4. Try to find out and remove HKU\S-1-5-21 Virus related files or other malicious files from Regidit Editor.

1.Press“Windows + R key” together to open Run Windows.

uninstall HKU\S-1-5-21 Virus

2. Type “regedit” in Run Window and click OK button to open registry.

3. Find and Remove Registry Files created by HKU\S-1-5-21 VIRUS and other threats:

Click Edit >> Click Find:

eliminate HKU\S-1-5-21 Virus

Type in virus’ name and click Find Next >> Delete dangerous registry files found.

Important Note!

Please Be Carefully When You’re Going to Delete Any File in Regedit Editor!

Before you delete any registry files, you need to 100% determine that these files are dangerous items. Please Do Not Delete Crucial System Files in Regedit Editor Mistakenly! Or your computer may be damaged!

If You Want To Avoid The Risk, we strongly suggest using a Professional Anti-Malware Tool to detect the malicious files hiding in Regedit Editor and other locations of your computer. Now check Step 5 and learn how to use it.

 

get rid of HKU\S-1-5-21 Virus


Step 5. Download SpyHunter Professional Anti-malware to Check Entire Computer. (Important Step!)

In case HKU\S-1-5-21 Virus has invaded your computer, it is possible that some other virus or malware are brought in as well . Therefore, our computer experts suggest checking entire system to find out the potential security risks. To do this efficiently and easily, it’s recommended to us a professional Anti-malware Tool – Spyhunter Anti-malware.

HKU\S-1-5-21 Virus removal tool

SpyHunter anti-malware is the best security tool for Windows OS. It is specialized in preventing all the latest virus & malware and removing all the infections hiding in a infected computer.

Certifications & Independent Test Reports on SpyHunter 5

 

1. Download SpyHunter Here:

Download SpyHunter Anti-Malware Now

( Learn more about SpyHunter and its key features. To understand SpyHunter’s policies and practices, please visit EULA, Threat Assessment Criteria, and Privacy Policy. To uninstall SpyHunter, follow the steps to uninstall instructions. Please keep in mind that SpyHunter’s malware detection tool is free. Once it detects a virus or malware, you’ll need to purchase its full version to remove the threat.)

[Helpful Tips] – If you fail to download SpyHunter, it is possible that the download link is blocked by another anti-malware tool running on your PC. In such situation, please try to Turn Off the running anti-malware tool, and come back to this page to try the above download link again. If the download still fails, you can learn why you’re having issues downloading SpyHunter.

2. Double click the SpyHunter-Installer:

removal tool for HKU\S-1-5-21 Virus

– When the “User Account Control” dialog appears, choose “Yes“.

3. Choose your preferable language and click the “OK” button to proceed the installation. Wait several minutes to complete the installation

4. Once the installation is completed, run SpyHunter and click Start Scan Now.

easily remove HKU\S-1-5-21 Virus

5. When scan is completed, select all detected dangerous items and click Next:

quickly remove HKU\S-1-5-21 Virus

6. If you want SpyHunter to help you remove all detected threats once for all and get the daily system protection from now on, please consider to Register its full version. If the automatic removal does not help, you can get One-on-one customer support to fix your problem from computer experts.

quickly delete HKU\S-1-5-21 Virus