Captcha-sourcecenter.com is an untrustworthy website designed to perform numerous dubious actions. Users who land on it can be shown suspicious content, promotions for various PUPs (Potentially Unwanted Programs), or taken to other third-party websites with questionable content.
Captcha-sourcecenter.com also has been observed to run a popular browser-based scam where users are tricked into subscribing to the site's push notification services. The specific scenario displayed to the visitors may vary but it has been confirmed that the site pretends to be conducting a captcha check for bots by displaying the following message:
'CLICK 'ALLOW' TO CONFIRM YOU ARE NOT A ROBOT!'
If you follow the instruction and click on the button, Captcha-sourcecenter.com will receive broad browser permission that will allow it to run an intrusive advertising campaign. The unwanted ad materials can even be displayed when the web browser has been shut down completely.
It should be noted that users do not land on websites such as Captcha-sourcecenter.com willingly, at least in the vast majority of cases. Instead, they are taken there through either force redirects caused by previously visited websites or as a result of having a PUP, adware, or a browser hijacker present on your computer or device. It is recommended to perform a scan with a reputable anti-malware product, and then remove all suspicious applications that are detected.