Hi Michael,
I'm Anwille, an Independent Advisor.
Sorry to hear you're experiencing this issue.
Upon seeing, this virus is called Mindspark, which is a browser hijacker. You must've got it by downloading or installing some freeware software. You can remove it by reading more from this site: https://community.webroot.com/webroot-secureany...
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.
Hope this helps. Let us know if you need more assistance.