[LouieFisk]

As has been suggested - firewall, here free -
https://www.zonealarm.com/software/free-firewall

And
Malwarebytes, free for a week or two, but it’s worth paying for it - it’ll save a lot of headaches:
https://www.malwarebytes.com/premium

and a free antivirus program - several really good ones, but AVG is a good old standby -
https://www.avg.com/en-us/free-antivirus-download

[puppypusher]

ZoneAlarm Extream Security is an excellent firewall/Anti-Malware/Antivius system.

I’ve been using it for well over 10 years with No Security issues.