I was on the American Chemical Society website and a tab opened up by itself. I must have done something when I went to the tab because as soon as I did, something was downloaded to my computer and it went too fast for me to be able to see what it was or where it ended up. I searched the entire hard drive manually for everything that had a “date modified” of today around the time it happened. Nothing was suspicious except for a file that I “did not have permission to access,” but the file was empty and created in 2019. It said it was modified around the time the incident occurred. I couldn’t delete the file either because it said something in the file was open. I checked the task manager and it said nothing was open. Webroot did a scan and found nothing. What do I need to do?