Ads Removal

Remove Ads by Greatdeals (Chrome/Firefox/IE)

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 Ads by Greatdeals. These Ads by Greatdeals removal instructions work for Chrome, Firefox and Internet Explorer, as well as every version of Windows.

In the text below we are describing a program from the Adware family – Ads by Greatdeals. Among its features we can distinguish the irritating display of different online advertisements (such as banners and pop-ups). When it comes to the category this program falls into, we can say that all the products which belong there may simply be able to affect one component of your system – all your browser apps, from Opera to Firefox, Explorer and Chrome.  Just read the following article if you are interested in all the details about this exact form of Adware or the whole group in general.

The main characteristics of Adware in general and Ads by Greatdeals in particular

What we can say for sure about this software category defined as Adware, is that its members are pretty much identified as experts at generating online ads. All Adware has been created with that sole purpose: to broadcast advertisements to the affected users and in this way motivate them to purchase the promoted goods. There is nothing special, odd or dangerous about that. All ad-producing programs are legal. They have been created out of the mutual drive of producers and programmers to achieve the best possible way of advertising services and products. In fact, both parties involved really benefit from the process of ad production as these pop-ups and banners are able to generate sufficient profits for them.

Why might some people mistake Adware for a form of malicious software?

In general, as we have explained in the previous paragraphs, there is really nothing harmful or illegal about Adware as a whole or Ads by Greatdeals particularly. In spite of that, a lot of users may still mistake the ad-broadcasting programs for viruses. This is because of their quite spoiled reputation: the produced ads could indeed irritate or startle several of the affected users, and they might report this issue as somehow intrusive or bothering. That’s why this software is generally seen as potentially unwanted.

Nonetheless, the programs producing ads and the programs with malicious effects do not share any common features. As an illustration, any Ransomware version (a popular malware group) can infect your device by itself and intrusively scan all your drives for the most essential data for you (based on the number of the times you have accessed it). Then all such files usually end up encrypted and you – bullied into paying a ransom to the hackers.  Such an issue is normally extremely complicated to deal with. On the contrary, the programs based on Adware are only capable of doing two suspicious things: to display too many advertisements while you are browsing the web; and connect the produced ads to your latest search requests by researching your usual activities while online. Nevertheless, no other data can be accessed by an Adware version.

The normal way of getting infected by Ads by Greatdeals (or another representative of Adware):

From a torrent to a software bundle, Adware could be lurking inside them all. The most exploited source remain the famous bundles. These mixtures of free software (sometimes comprising new apps and new games) could appear very interesting to you and you may want to download or try some of them. The issue with them may be the fact that they may sometimes include ad-displaying programs or browser hijackers and you might NOT get informed about them.  The only way to stay Adware-free is to install whatever you download from the web in the RIGHT way. By the RIGHT way we mean the most elaborate and manually-done installation method. The only two options of the installer which can perform such a detailed installation process are the following ones:

  • The Custom (sometimes marked as Customized) or the Advanced features. Select either of them and you get the opportunity to clearly state what you want to install on your computer and what you don’t want to incorporate into your system.

How you can uninstall Ads by Greatdeals:

For a safe and successful uninstallation process, please refer to the instructions we have included in the Removal Guide just after this article. Hopefully, they will save you from this irritating program. However, never forget that the only 100% functional tool against such annoying software is prevention. Simply try to minimize the number of times you visit suspicious online locations and download strange bundles and torrents.



Name Ads by Greatdeals
Type  Adware
Danger Level Medium (nowhere near threats like Ransomware, but still a security risk)
Symptoms Too annoying broadcast of online ads, which may seriously bother your online experience.
Distribution Method Most often via bundles, torrents, spam and shareware.
Detection Tool

Keep in mind, SpyHunter’s malware detection tool is free. To remove the infection, you’ll need to purchase the full version. More information about SpyHunter and steps to uninstall.

Remove Ads by Greatdeals

If you are a Windows user, continue with the guide below.

If you are a Mac user, please use our How to remove Ads on Mac guide.

If you are an Android user, please use our Android Malware Removal guide.


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).



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.

Press CTRL + SHIFT + ESC at the same time and go to the Processes Tab (the “Details” Tab on Win 8 and 10). Try to determine which processes are dangerous. 


Right click on each of them and select Open File Location. Then scan the files with our free online virus scanner:

Drag and Drop Files Here to Scan
Maximum file size: 128MB.

This scanner is free and will always remain free for our website's users. You can find its full-page version at:

Scan Results

Virus Scanner Result

After you open their folder, end the processes that are infected, then delete their folders. 

Note: If you are sure something is part of the infection – delete it, even if the scanner doesn’t flag it. No anti-virus program can detect all infections. 


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.



  • After you complete this step, the threat will be gone from your browsers. Finish the next step as well or it may reappear on a system reboot.

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 Ads by Greatdeals 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  Ads by Greatdeals from Firefox:

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

pic 6

Find the adware/malware —> Remove.
chrome-logo-transparent-backgroundRemove  Ads by Greatdeals 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.


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.

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 up 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

If the guide doesn’t help, download the anti-virus program we recommended or try our free online virus scanner. Also, you can always ask us in the comments for help!

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