Addonjet and a.karmakitty.info

What a crap...

Another case on malware cleaning shows how to get rid of the annoying karmakitty pop-ups in Google Chrome and unwished ads by Addonjet.

The computer is infected with malware and the web browser can't be used properly anymore. In every step you take another pop-up appears wanting you to call a phone number. In my case the problems only occured on Google Chrome.

Possible browser extensions which were also responsible for this couldn't be removed anymore. The settings menu closed when you attempted to open the extension list. Cleaning up the cache didn't help to solve this.

And there was no unwanted software installed so the fastest and most-effective way was to run a complete malware check. I recommend Malwarebytes Anti-Malware, which found a lot of infections.
After the clean-up and restart the whole issue was solved. Make sure your antivirus software is working properly or may get a better one.