Recently, an increasing number of users have been reporting a problem where files with a .js extension are attempting to download onto the computer through the user’s browser. Here, in this article, we will explain to you what exactly is happening and how harmful it is to your system and computer. If you have that same issue on your PC, we also have prepared a removal guide that will help you stop the the nagging download requests or any other form of intrusive pop-ups that get displayed when you are using your browser. Just make sure to read all the information provided in the article itself, since it is important to have a good understanding of what you are dealing with.
Are those .js files harmful?
Ad-blocker – will it help?
Some of you might have considered simply getting an add-blocker to deal with the issue. In some cases, an ad-blocker might work, but this would only be effective if an unwanted .js file or some other unwanted form of Adware (advertising-supported software) has not already gotten onto your PC. If you an unwanted ad-generating file has already made its way inside your machine, the best way to stop the nagging pop-ups is to remove it (which we will help you do).
Always deny the download!
This should go without saying, yet we will say it anyway for the sake of clarity – it is crucial that you DO NOT agree to the download. Even if .js files are not some sort of malicious Trojan Horse or Ransomware, they are surely unwanted unless you have willingly initiated the download process. In some cases, they can even directly download onto your PC without even asking for your permission. To avoid this happening to you, in our next paragraph we will give you a couple of useful tips that would help you improve your PC’s general online security.
Stay Safe while surfing the web
Almost always the issue of having unwanted downloads to your PC stems from the user’s irresponsible and/or inattentive behavior while browsing the Internet. After all, you won’t be dealing with some form of a .js downloading Adware/Malware if you only visit reputable and reliable websites that have been verified as trustworthy. Therefore, here are several simple yet crucial guidelines that you’d need to adhere to if you are to prevent any problems with unwanted .js files in future:
- Spam – Spam is another extremely common method for spreading unwanted software. All it takes from you is to click on some shady spam link to download an unwanted .js file to some random folder on your PC and then it could take hours to pinpoint that folder and delete the intrusive piece of programming. That is why, you must always think twice before you open new e-mails or interact with hyperlinks that are send to you since there’s always the chance that they are some form of spam.
|Name||.js File Virus|
|Danger Level||Medium (nowhere near threats like Ransomware, but still a security risk)|
|Symptoms||Unwanted .js file download pop-ups appearing every now and then. Sometimes, the files might get directly downloaded onto your PC, without requiring your permission.|
|Distribution Method||Banners throughout shady websites, spam e-mails, Adware programs that have already been installed on your PC without your knowledge.|
|Detection Tool||We generally recommend SpyHunter or a similar anti-malware program that is updated daily.|
.js File 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, you may have to meddle with system files and registries. Making a mistake and deleting the wrong thing may damage your system.
Avoid this by using SpyHunter - a professional Parasite removal tool.
- Do not skip this – .js File Virus 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:
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.
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 .js File Virus 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 .js File Virus from Firefox:
Open Firefox, click ——-> Add-ons —-> Extensions.
Find the adware/malware —> Remove.
Remove .js File Virus 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.
- 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.
WARNING! READ CAREFULLY BEFORE PROCEEDING!
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. If you want a fast safe solution, we recommend SpyHunter.
Right click on each of the problematic processes separately and select Open File Location. End 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—Internet Explorer—-Main—- Random
Remember to leave us a comment if you run into any trouble!