Pop up notice about system infected on my computer after logging on to a website every 15 minutes
I listed a camera on eBay and a bidder asked a question about the # of images and gave me a web site to verify it.
I went to it and another screen popped up about a request to buy virus software.
I immediately closed it out.
Unfortunately every 15 minutes a notice in the upper right hand corner of my Mac Studio shows a notice of with banners like "System Mac OS is infected", Gmail is infected, etc
Nothing seems to have changed in my using the computer.
I have tried : restart, shutting down, Disk Utility repair, file fault and it keeps showing.
I am old and not the best at this so I need simply directions to what may be a complicated process.
Thanks,
Mac Studio, macOS 13.3