OFFER*Source of claim SH can remove it.
Mouse Extension
Mouse Extension is a program that is used to promote different websites and advertisements in your web browser. Normally, during your web browsing sessions, Mouse Extension publishes sponsored pop-up ads and banners that redirect to certain Internet sites.
Users with Mouse Extension on their device will usually find that when their default web browser (whether that is Chrome, Firefox, Edge or some other browser) is opened, their screen begins to get filled with various pop-up ads and promotions. You can also detect search engine and homepage updates and other new buttons and toolbars which were not available previously. These “improvements” to the web browser’s functionalities and appearance can certainly be bothering, more so because they usually take place without being approved. The good news is that the program that introduces them is not a virus that could harm your computer like a Trojan or encrypt your files like ransomware. Mouse Extension may seem like a dangerous virus initially and may even be taken for one by many web users, but, in reality, this program is a browser hijacker that is used for online advertising purposes. There are, however, some good reasons why you might want it removed.
The Mouse Extension Chrome Virus
The main aim of teh Mouse Extension Chrome virus or Ultra Extension is to change the browser’s toolbar, default search engine and the user’s favorite homepage with some sponsored ones in order to enable display of paid ads and sponsored search results. For example, a web site popularized by the Mouse Extension’s Chrome virus developers is likely to be the new homepage for the browser.
When you and other users who have the hacker installed on the computer have this specific site as their default homepage, you will automatically be redirected to it whenever you begin your search. Similarly, the new search engine, placed by the hijacker, is most likely a modified version of an existing search engine that displays primarily sponsored search results and loads additional advertisements at the top of the search results.
Fortunately, none of these changes are harmful to your computer, but they definitely can affect the way you access and surf the web and can give you a good reason to want to uninstall the program that is behind them. Besides, even though pieces like Mouse Extension lack the harmful potential of Trojans, Ransomware and other computer viruses, many security experts recommending removing them. The main reason is, some of the commercial messages that the browser hijackers promote may not be trustworthy. For instance, you may see an ad that pretends to advertise a specific product, but when you click on it, you may land on a completely different page, unrelated to that product. Or, you may get redirected to dubious online offers with unrealistic promotions that prompt you to download and install more unnecessary apps or even viruses and malware, such as the aforementioned Ransomware and Trojans. Therefore, for your safety, it is better not to trust the offers that the browser hijacker generates and uninstall it from your computer with the help of the instructions below.
SUMMARY:
| Name | Mouse Extension |
| Type | Browser Hijacker |
| Detection Tool | We tested that SpyHunter successfully removes parasite* and we recommend downloading it. Manual removal may take hours, it can harm your system if you re not careful, and parasite may reinstall itself at the end if you don't delete its core files. |
*Source of claim SH can remove it.
Remove Mouse Extension Virus
To try and remove Mouse Extension quickly you can try this:
- Go to your browser’s settings and select More Tools (or Add-ons, depending on your browser).
- Then click on the Extensions tab.
- Look for the Mouse Extension extension (as well as any other unfamiliar ones).
- Remove Mouse Extension by clicking on the Trash Bin icon next to its name.
- Confirm and get rid of Mouse Extension and any other suspicious items.
If this does not work as described please follow our more detailed Mouse Extension removal guide below.
If you have a Windows virus, continue with the guide below.
If you have a Mac virus, please use our How to remove Ads on Mac guide.
If you have an Android virus, please use our Android Malware Removal guide.
If you have an iPhone virus, please use our iPhone Virus 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).
WARNING! READ CAREFULLY BEFORE PROCEEDING!
*Source of claim SH can remove it.
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:
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.
*Source of claim SH can remove it.
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:
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.
- Right-click on the Network Adapter you are using —> Properties —> Internet Protocol Version 4 (ICP/IP), click Properties.
- The DNS line should be set to Obtain DNS server automatically. If it is not, set it yourself.
- 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.
Remove Mouse Extension from Internet Explorer:
Open IE, click 
—–> Manage Add-ons.
Find the threat —> Disable. Go to —–> Internet Options —> change the URL to whatever you use (if hijacked) —> Apply.
Remove Mouse Extension from Firefox:
Open Firefox, click 
——-> Add-ons —-> Extensions.
Find the adware/malware —> Remove.
Remove Mouse Extension from Chrome:
Close Chrome. Navigate to:
C:/Users/!!!!USER NAME!!!!/AppData/Local/Google/Chrome/User Data. There is a Folder called “Default” inside:
Rename it to Backup Default. Restart Chrome.
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!
Leave a Comment