Free Antivirus
Panda Cloud Antivirus
This is a strong product but has annoying ads

Paid Antivirus
Norton Security
Norton has a great product that helps protect you from downloading viruses

Malwarebytes Malware Removal Tool
They have a paid product that is a great addition to an anti-virus product
It stops some of the most common problems that anti-virus ignores
They have a free product to help clean up existing issues

Windows 10 Media Creation Tool
Use this tool if you need to reinstall Windows 10