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:


YAHOOSSISTANT 1.0 is classified as Win32:PUP-gen (potentially unwanted program).

What is PUP? PUP is crapware.
YAHOOSSISTANT 1.0 have several types of unwanted behaviour:

  1. Displaying popup ads.
  2. Hijacking your browser.
  3. Infecting your desktop shortcuts, etc.
  4. Inserting ads to the web pages.

YAHOOSSISTANT 1.0 can redirect your browser search, collect your personal information and sell it for advertising.
YAHOOSSISTANT 1.0 is usually hard in removing. Some people could not find uninstall program for YAHOOSSISTANT 1.0 in the Control Panel.
Sometimes YAHOOSSISTANT 1.0 uninstaller does not work.


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How YAHOOSSISTANT 1.0 got on your computer?

Usually you got YAHOOSSISTANT 1.0 with as part of a bundle with another tool you downloaded from the Internet. Since YAHOOSSISTANT 1.0 manufacturer pays software developers for distributing YAHOOSSISTANT 1.0 within their applications, YAHOOSSISTANT 1.0 is often included as part of the installer.
Usually, you have not only one YAHOOSSISTANT 1.0 problem, but a bunch of similar WIN32:PUPs.

You have 2 ways to remove YAHOOSSISTANT 1.0:

You have 2 ways

Remove it automatically1. Remove Automatically.
Remove it manually2. Remove Manually.

Why I recommend you to use an automatic way?

  1. You know only one virus name: "YAHOOSSISTANT 1.0", 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 YAHOOSSISTANT 1.0 virus automatically:

STEP 1: Install UnHackMe (1 minute)

STEP 2: Scan for malware using UnHackMe (1 minute)

STEP 3: Remove YAHOOSSISTANT 1.0 virus (3 minutes)

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 YAHOOSSISTANT 1.0 redirect or other unwanted software.

How to remove YAHOOSSISTANT 1.0 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 YAHOOSSISTANT 1.0 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)\Google\Chrome\Application\chrome.exe.
Fake browser may be: …\Appdata\Roaming\HPReyos\ReyosStarter3.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.

check installed programs to uninstall

STEP 3: Open Task Manager and close all processes, related to YAHOOSSISTANT 1.0 in their description. Discover the directories where such processes start. Search for random or strange file names.

Remove YAHOOSSISTANT 1.0 virus from running processes

Remove YAHOOSSISTANT 1.0 virus from running processes

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

Remove YAHOOSSISTANT 1.0 virus from Windows services

Remove YAHOOSSISTANT 1.0 virus from Windows services

Disable the services with random names or contains YAHOOSSISTANT 1.0 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.
Remove YAHOOSSISTANT 1.0 from scheduled task list.

Delete any task related to YAHOOSSISTANT 1.0. Disable unknown tasks with random names.

STEP 6: Clear the Windows registry from YAHOOSSISTANT 1.0 virus.
Press Win+R, type in: regedit.exe and press OK.

Remove YAHOOSSISTANT 1.0 virus from Windows registry

Remove YAHOOSSISTANT 1.0 virus from Windows registry

Find and delete all keys/values contains YAHOOSSISTANT 1.0.

STEP 7: Remove YAHOOSSISTANT 1.0 from Google Chrome.
Remove YAHOOSSISTANT 1.0 Virus from Chrome Extensions

STEP 8: Remove YAHOOSSISTANT 1.0 from Internet Explorer.

Set Internet Explorer Homepage

Set Internet Explorer Homepage

STEP 9: Remove YAHOOSSISTANT 1.0 from Mozilla Firefox.

Change Firefox Home Page

Change Firefox Home Page

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

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

I use UnHackMe for cleaning ads and viruses from my friend's computers, because it is extremely fast and effective.

STEP 1: Download UnHackMe for free

UnHackMe removes Adware/Spyware/Unwanted Programs/Browser Hijackers/Search Redirectors from your PC easily.

Free Download

UnHackMe is compatible with most antivirus software.
UnHackMe is 100% CLEAN, which means it does not contain any form of malware, including adware, spyware, viruses, trojans and backdoors. VirusTotal (0/56).
System Requirements: Windows 2000-Windows 8.1/10 32 or 64-bit. UnHackMe uses minimum of computer resources.

STEP 2: Double click on UnHackMe_setup.exe

You will see a confirmation screen with verified publisher: Greatis Software. Verified Publisher Greatis Software

Once UnHackMe has installed the first Scan will start automatically

Review the detected threats

STEP 3: Carefully review the detected threats!

Click Remove button or False Positive.


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