It's not possible to remove it using the standard extension disablement/removal features in Chrome - the checkbox is disabled. I also found that the extension gets installed under C:\Users\\AppData\Local\Google\Chrome\User Data\Default\Extensions\ - tried to delete it there, but it's still active. In fact, I tried deleting the whole C:\Users\\AppData\Local\Google\Chrome\User Data\ directory, but the next time Chrome starts, it recreates it and the extension gets recreated. Seems like there is something running in Windows that keeps detecting that Chrome extension is not there anymore and reinstates it. Any ideas how to get rid of it?