I'm getting this symbols when trying to open the extensions for adblock plus and avast on google chrome. Someone told me it was adware, but I ran scans with both malwarebytes and avast, and didn't find anything. blocked ads also have all these weird symbols. see attached screen-capture.
OS: Windows 10 Pro 64bit
Browser: Google Chrome
Active extensions:
AdBlock Plus
Avast! Online Security
Edit: added more info on the browser