How to stop captcha-sourcecenter.com from being opened

What is captcha-sourcecenter[.]com?

captcha-sourcecenter[.]com is an untrusted website that can load dubious content or open other pages of this kind (depending on visitors' geolocations). You are strongly advised to avoid captcha-sourcecenter[.]com and similar sites.

Many users arrive at these bogus sites inadvertently. For example, by clicking deceptive advertisements or while visiting other rogue pages. Browsers often open sites such as captcha-sourcecenter[.]com due to potentially unwanted applications (PUAs) installed on them.

Some examples of pages similar to captcha-sourcecenter[.]com are yourcommonfeed[.]com, cpa-optimizer[.]best, and very-important[.]online.

captcha-sourcecenter [.]com is likely to be used to promote download websites for browser hijackers, adware-type applications, and other potentially unwanted apps, and other untrustworthy websites (e.g., lottery scams, technical support scams).

captcha-sourcecenter[.]com can load dubious content as well. At the time of research, this page showed a deceptive message encouraging users to click the "Allow" button to verify that the visitor is human (i.e., not a robot). This is a common 'clickbait' technique used to trick people into allowing websites to show notifications. If allowed, the sites start to show notifications with deceptive advertisements, links to other bogus sites, or other dubious notifications. Therefore, you are strongly advised not to allow captcha-sourcecenter[.]com and other similar pages to show notifications.

These sites are often promoted via PUAs, and these apps can be designed to generate ads. For example, coupons, banners, surveys, and pop-ups. These ads can be designed to execute scripts and cause unwanted downloads and installations, or open dubious websites.

PUAs often collect data, targeting browsing details. For example, IP addresses, geolocations, addresses of visited websites, and entered search queries. Sometimes apps of this kind can access sensitive details as well. Data collected by PUAs can be misused for marketing purposes, sold to third parties, and monetized in other ways.

Threat Summary:

Name	Ads by captcha-sourcecenter.com
Threat Type	Push notifications ads, Unwanted ads, Pop-up ads
Detection Names	Fortinet (Spam), Spamhaus (Spam), Full List Of Detections (VirusTotal)
Serving IP Address	5.8.34.165
Observed Domains	a.captcha-sourcecenter[.]com, b.captcha-sourcecenter[.]com, c.captcha-sourcecenter[.]com, d.captcha-sourcecenter[.]com, e.captcha-sourcecenter[.]com, f.captcha-sourcecenter[.]com
Symptoms	Seeing advertisements not originating from the sites you are browsing. Intrusive pop-up ads. Decreased Internet browsing speed.
Distribution Methods	Deceptive pop-up ads, potentially unwanted applications (adware)
Damage	Decreased computer performance, browser tracking - privacy issues, possible additional malware infections.
Malware Removal (Windows)	To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Combo Cleaner. ▼ Download Combo Cleaner To use full-featured product, you have to purchase a license for Combo Cleaner. 7 days free trial available. Combo Cleaner is owned and operated by Rcs Lt, the parent company of PCRisk.com read more.

In summary, potentially unwanted applications and the sites they open/promote (including captcha-sourcecenter[.]com) cannot be trusted. PUAs are designed only to generate revenue for the developer and are useless to regular users (even when they are advertised as a legitimate, useful applications).

If an app of this type is already installed on the browser/computer, remove it immediately.

How did adware install on my computer?

People often download and install unwanted apps inadvertently via deceptive advertisements - they click ads that cause unwanted download/installations by executing certain scripts.

Unwanted downloads and installations also occur during download/installation of other programs. I.e., when PUAs are included into the set-ups as 'extra offers'. This PUA distribution method of PUAs is called "bundling".

Typically, offers to download and install these additional apps can be declined via "Custom", "Advanced" or other settings, or by unticking certain checkboxes within the set-ups. When users download and install programs without making these checks and changes, they often allow PUAs to infiltrate.

How to avoid installation of potentially unwanted applications

Download software and files from official websites and via direct links. It is not safe to use torrent clients, eMule (or other Peer-to-Peer networks), third party downloaders, unofficial websites or other sources of this kind.

Avoid third party installers. Check "Advanced", "Custom" and other settings, and decline offers to download or install unwanted software. Do not click ads that are displayed on dubious websites, since they can open other untrusted websites or even cause unwanted downloads and installations.

Remove any unwanted, suspicious applications (extensions, add-ons, and plug-ins) that are installed on the browser. The same should be applied to programs of this kind that are installed on the operating system.

Regularly scan your computer with reputable antivirus or anti-spyware software and keep this software up to date.

If your computer is already infected with rogue applications, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate them.

Appearance of captcha-sourcecenter[.]com website (GIF):

Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced IT skills. Combo Cleaner is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
▼ DOWNLOAD Combo Cleaner By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. To use full-featured product, you have to purchase a license for Combo Cleaner. 7 days free trial available. Combo Cleaner is owned and operated by Rcs Lt, the parent company of PCRisk.com read more.

Quick menu:

• What is Ads by captcha-sourcecenter.com?
• STEP 1. Remove spam notifications from Google Chrome
• STEP 2. Remove spam notifications from Google Chrome (Android)
• STEP 3. Remove spam notifications from Mozilla Firefox
• STEP 4. Remove spam notifications from Microsoft Edge
• STEP 5. Remove spam notifications from Safari (macOS)

Disable unwanted browser notifications:

Video showing how to disable web browser notifications:

Remove spam notifications from Google Chrome:

Click the Menu button (three dots) on the right upper corner of the screen and select "Settings". In the opened window select "Privacy and security", then click on "Site Settings" and choose "Notifications".

In the "Allowed to send notifications" list search for websites that you want to stop receiving notifications from. Click on the three dots icon near the website URL and click "Block" or "Remove" (if you click "Remove" and visit the malicious site once more, it will ask to enable notifications again).

Remove spam notifications from Google Chrome (Android):

Tap the Menu button (three dots) on the right upper corner of the screen and select "Settings". Scroll down, tap on "Site settings" and then "Notifications".

In the opened window, locate all suspicious URLs and tap on them one-by-one. Once the pop-up shows up, select either "Block" or "Remove" (if you tap "Remove" and visit the malicious site once more, it will ask to enable notifications again).

Remove spam notifications from Mozilla Firefox:

Click the Menu button (three bars) on the right upper corner of the screen. Select "Settings" and click on "Privacy & Security" in the toolbar on the left hand side of the screen. Scroll down to the "Permissions" section and click the "Settings" button next to "Notifications".

In the opened window, locate all suspicious URLs and block them using the drop-down menu or either remove them by clicking "Remove Website" at the bottom of the window (if you click "Remove Website" and visit the malicious site once more, it will ask to enable notifications again).

Remove spam notifications from Microsoft Edge:

Click the menu button (three dots) on the right upper corner of the Edge window and select "Settings". Click on "Cookies and site permissions" in the toolbar on the left hand side of the screen and select "Notifications".

Click three dots on the right hand side of each suspicious URL under "Allow" section and click "Block" or "Remove" (if you click "Remove" and visit the malicious site once more, it will ask to enable notifications again).

Remove spam notifications from Safari (macOS):

Click "Safari" button on the left upper corner of the screen and select "Preferences...". Select the "Websites" tab and then select "Notifications" section on the left pane.

Check for suspicious URLs and apply the "Deny" option using the drop-down menu or either remove them by clicking "Remove" at the bottom of the window (if you click "Remove" and visit the malicious site once more, it will ask to enable notifications again)

How to avoid browser notification spam?

Internet users should be very skeptical when being asked to allow notifications. While this is a useful feature that allows you to receive timely news from websites you like, deceptive marketers frequently abuse it.

Only allow notifications from websites that you fully trust. For added security - use an anti-malware application with a real-time web browsing monitor to block shady websites that tries to trick you into allowing spam notifications. We recommend using Combo Cleaner Antivirus for Windows.

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