REYOSSTARTER3.exe “Virus” Removal (Chrome/Firefox)

Parasite may reinstall itself multiple times if you don't delete its core files. We recommend downloading SpyHunter to scan for malicious programs installed with it. This may save you hours and cut down your time to about 15 minutes. 

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More information on SpyHunter, steps to uninstallEULAThreat Assessment Criteria, and Privacy Policy.

This page aims to help you remove REYOSSTARTER3 from your PC. REYOSSTARTER3.exe is an executable file associated with HPREYOS – a known Adware application.

The advertisements that may have recently been annoying you are a direct result of an infection with REYOSSTARTER3 – an Adware-based program that specializes in showing ads inside your favorite browsers (Chrome / Firefox / Explorer). None of the popular browsers are really immune to the pop-ups, tabs, boxes and banners in various shapes, sizes and colors, containing the “best deals” that you may find on the Internet.

Is your PC the victim of a virus?

REYOSSTARTER3 is an Adware product, not malware. Its effects on your computer are really limited to an intense process of broadcasting as many ads as possible on your screen. Adware-based programs have always been programmed to display the biggest number of pop-ups, tabs, banners and boxes as they are able to. This typical feature that every type of ad-displaying software possesses is directly linked to the way these programs get spread and the motivation that they give to their developers. What is capable of motivating people to do practically anything nowadays? Money. That’s why developers use Adware programs as elements in their software bundles. As they can generate ads, they are a gold mine for programmers to further fund their companies. Interested vendors all around the world pay vast amounts of money in order to promote their goods in the best possible way. As everything is online-based today, the most efficient way of advertising something is to do that online. And the ads you may find irritating do exactly that – they get exploited by the marketing industry. Such ad campaigns are legitimate and an important practice that many vendors and software creators use for their own purposes. However, the mass generation of disturbing ads and the frustration of your browsing activities that may come out of that still do not make REYOSSTARTER3.exe a malicious program. What malware typically does is not displaying ads, but destroying files, locking up data (as Ransomware normally does) or stealing credentials and keeping track of your key strokes. None of these characteristics really apply to Adware.

Still, you can’t remember installing any Adware on your PC

As we have mentioned above, most Adware as well as REYOSSTARTER3.exe is typically distributed around via program bundles. However, the way they are installed on any computer may appear slightly confusing to some users and as a result many people may mistake Adware for a virus like Ransomware. Some users believe that REYOSSTARTER3.exe might self-install on their PCs but this is not the truth. The truth is that they have allowed it to become a part of their systems by themselves, however, it has happened in a rather shady way and no memory has remained about that. Here is an example of what we mean:

Imagine that you have just downloaded a software bundle that contains a really cool game and you want to start playing it as soon as possible. For this purpose you don’t mind skipping some installation procedures and when the wizard appears, you choose the shortcut and install the whole bundle in one click – the click on the option “Install this software by default”. That’s how you may end up contaminated with an Adware-like program. The right choice in such a situation is to carefully examine the installer and find the feature that gives you the opportunity to install particular programs from a given bundle and leave others behind. Usually this option will be called Custom or Advanced. Make sure that this is the one that you use from now on to prevent any future infections and damage to your PC.

How to remove REYOSSTARTER3.exe and how to bypass any Adware-caused issues in the future

The main source of ad-producing software has already been revealed to you. Make sure that you handle all the program bundles that you download in the aforementioned way to stay safe. Also, arm your PC with the newest or the best version of a good-quality anti-virus program. This tool, as well as a working Firewall and an efficient pop-up blocker, will certainly reduce your risk of catching any hijackers, Adware and even malware. To safely uninstall REYOSSTARTER3.exe from your system, we recommend that you try our Removal Guide below. It is created to do exactly that – get rid of ad-displaying programs. Simply follow the instructions and everything should go smoothly.


Type Adware
Danger Level Medium (nowhere near threats like Ransomware, but still a security risk)
Symptoms Your browser may be showing unusually many non-webpage-hosted ads in diverse forms.
Distribution Method Through program bundling, spam emails, torrents.
Detection Tool


REYOSSTARTER3.exe “Virus” Removal


Some of the steps will likely require you to exit the page. Bookmark it for later reference.

Reboot in Safe Mode (use this guide if you don’t know how to do it).


To remove parasite on your own, you may have to meddle with system files and registries. If you were to do this, you need to be extremely careful, because you may damage your system.

If you want to avoid the risk, we recommend downloading SpyHunter
a professional malware removal tool.

More information on SpyHunter, steps to uninstallEULAThreat Assessment Criteria, and Privacy Policy.

Reveal All Hidden Files and Folders.

  • Do not skip this  – REYOSSTARTER3.exe may have hidden some of its files.

Hold together the Start Key and R. Type appwiz.cpl –> OK.


You are now in the Control Panel. Look for suspicious entries. Uninstall it/them.

Type msconfig in the search field and hit enter. A window will pop-up:


Startup —> Uncheck entries that have “Unknown” as Manufacturer or otherwise look suspicious.


Hold the Start Key and R –  copy + paste the following and click OK:

notepad %windir%/system32/Drivers/etc/hosts

A new file will open. If you are hacked, there will be a bunch of other IPs connected to you at the bottom. Look at the image below:

hosts_opt (1)

If there are suspicious IPs below “Localhost” – write to us in the comments.

Open the start menu and search for Network Connections (On Windows 10 you just write it after clicking the Windows button), press enter.

  1. Right-click on the Network Adapter you are using —> Properties —> Internet Protocol Version 4 (ICP/IP), click  Properties.
  2. The DNS line should be set to Obtain DNS server automatically. If it is not, set it yourself.
  3. Click on Advanced —> the DNS tab. Remove everything here (if there is something) —> OK.



Right click on the browser’s shortcut —> Properties.

NOTE: We are showing Google Chrome, but you can do this for Firefox and IE (or Edge).


Properties —–> Shortcut. In Target, remove everything after .exe.

ie9-10_512x512  Remove REYOSSTARTER3.exe from Internet Explorer:

Open IE, click  IE GEAR —–> Manage Add-ons.

pic 3

Find the threat —> Disable. Go to IE GEAR —–> Internet Options —> change the URL to whatever you use (if hijacked) —> Apply.

firefox-512 Remove REYOSSTARTER3.exe from Firefox:

Open Firefoxclick  mozilla menu  ——-> Add-ons —-> Extensions.

pic 6

Find the adware/malware —> Remove.
chrome-logo-transparent-backgroundRemove REYOSSTARTER3.exe from Chrome:

Close Chrome. Navigate to:

 C:/Users/!!!!USER NAME!!!!/AppData/Local/Google/Chrome/User Data. There is a Folder called “Default” inside:

Rename the Folder to Backup Default

Rename it to Backup Default. Restart Chrome.

  • At this point the threat is gone from Chrome, but complete the entire guide or it may reappear on a system reboot.


Press CTRL + SHIFT + ESC simultaneously. Go to the Processes Tab. Try to determine which ones are dangerous. Google them or ask us in the comments.


We get asked this a lot, so we are putting it here: Removing parasite manually may take hours and damage your system in the process. We recommend downloading SpyHunter to see if it can detect parasite files for you.

Right click on each of the problematic processes separately and select Open File LocationEnd the process after you open the folder, then delete the directories you were sent to.



Type Regedit in the windows search field and press Enter.

Inside, press CTRL and F together and type the threat’s Name. Right click and delete any entries you find with a similar name. If they don’t show this way, go manually to these directories and delete/uninstall them:

  • HKEY_CURRENT_USER—-Software—–Random Directory. It could be any one of them – ask us if you can’t discern which ones are malicious.
    HKEY_CURRENT_USER—-Software—Microsoft—-Windows—CurrentVersion—Run– Random
    HKEY_CURRENT_USER—-Software—Microsoft—Internet Explorer—-Main—- Random

Remember to leave us a comment if you run into any trouble!

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