Hello, my name is Marco and I am an Independent Advisor. I will do my best to help you.
Have you checked with anti virus and antispyware?
I recommend both below.
It is possible that your browser is infected with malicious files.
If that doesn't change anything, we'll try something else.
AdwCleaner to clean browser: https://www.malwarebytes.com/adwcleaner/
Malwarebytes to clean pc: https://malwarebytes.com/
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Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.