Useful Resources

Malwarebytes Free Anti Malware Scanner
Useful for detecting and removing any Malware/Virus infections – real time scanning is a paid-for option.
https://www.malwarebytes.com/mwb-download/

Microsoft’s Safety Scanner
This is designed to find existing malware on a Windows computer. It does not offer real-time protection.
https://www.microsoft.com/en-us/wdsi/products/scanner

Find out more about the types of threat on the Microsoft security site:
https://www.microsoft.com/en-us/wdsi/threats
(link added 02.10.17)