Yesterday, I was viewing a bulletin board on a website (Chronicle of the Horse) using either MS Edge or Internet Explorer (I can’t remember which). I was reading a thread and a word was randomly highlighted in blue on the page. A few seconds later it happened again. Then I think the window moved and was resized. It all happened very quickly, but immediately following this it was as if I had lost control of my computer as all sorts of things started happening at once. I think the window moved and was resized again. Several new webpages opened at once (all Google search pages) and when I tried to shut off the machine via the metro button I was not able to stay on the menu to shut down the machine. I hit the on/off button and when I rebooted I ran three virus scans with McAfee and three with Malwarebytes. Both scans came up clean. I haven’t had any issues since restarting my computer, but am worried there might be something lurking in the background.
My machine is a Microsoft Surface Pro 4 with Office 365, Windows 10 Pro. My virus protection is McAfee Total Protection and Malwarebytes Premium.
Thank you for your help!