Three programs: Malwarebytes, Spybot, and Ccleaner. Two antispyware apps to fix infections and one "windows washer" to clean out temp files. That's it. Get used to seeing the above screens. If you run a PC or laptop, you need to learn more about these programs.
Malwarebytes and Spybot clean up malware/spyware infections. Two such programs (aka apps) are required because spyware and malware (interchangeable terms) are so pervasive. Ccleaner cleans up temp files and histories, places bad guys hide. They are free to install and use, but please feel free to donate on their sites (Malwarebytes offers a paid subscriber version).
Online scans often work well too (see links). The links on this page should get you started. If the links don't work, google those names for a download. Get started by downloading the files you need.