@Sue98 If your antivirus has been running for 8 hours, I'd assume something is wrong. If you can still search, find 'Malwarebytes', download it, install it and run it. Select the free version and I'd personally decline the free trial of the advanced version for now. You can decide later if you want to try it. It's a very effective removal tool. I'd post a link for you but they'd probably delete it. You might also consider something in addition to Windows Defender going foward.
In my pantry with my cupcakes...