I think I might have downloaded malware and want to know if there is a program I can run on my computer to look for malware
I was on a website and a tab with another website that looked sketch came onto my screen. I couldn't exit the page and a message appeared on my screen saying something about safeguarding my mac and in a panic I just clicked "Okay" because there were no other options. The popup message did not say anything about a download, but immediately something downloaded to my computer so right away, without looking at it, I moved whatever had downloaded from my downloads into my trash and then emptied my trash. I know I should have read the message or tried to force quit my browser but I panicked and am now concerned I may have downloaded some type of malware. I am aware that there are no mac viruses "in the wild" but am concerned I may have downloaded spyware or a trojan. I was borrowing a family members computer and they do not know if they had any antivirus software but I am assuming because they do not know that they do not have any sort of security downloaded other than what comes with the mac. I was wondering if there is some sort of program I could run to check for malware and what I should do with the computer in the meantime, like maybe have it shut off? And in the case of some sort of malware, does that mean I need to get a new computer? I'm just scared and know I should have been smarter about the situation but now I don't know what to do.
