I was reading my Facebook feed using Firefox (v56, 64bit) and saw a story about the Clemson coach and so I clicked on the story. A new tab opened up and then the browser suddenly looked like there was a problem with the video card, the PC speaker started making a constant shrill noise, and a web login (similar to what you'd see with IIS or Apache) showed on my screen.
I went to task manager, killed Firefox and disconnected my connection to the Internet. I then started Malware Bytes, reconnected to the Internet long enough to get the updates, then disconnected again and ran a custom scan on the whole drive (with scan for rootkits enabled). The scan came back clean and so I ran an Avira scan (Free version) and it ran for several hours and didn't find anything. Finally, I booted into safe mode and re-ran a MalWareBytes scan and once again, it came up with no detections.
I'm always one to err on the side of caution, but I really don't want to reload WIndows.
I am on a Dell Vostro with 4 GB of memory, 750GB HDD, Windows 10 (Updates current), Avira Security Suite (Updates Current), MalwareBytes 3 (Updates Current)
Strange behavior on a website always makes me anxious about having downloaded some payload.
Any suggestions? Move forward with caution or reload?