The No More Ransom project website has free decryption tools for many known ransomware types. Avast Decryption Tools and ID Ransomware are other websites that can help victims of ramsomware. A list of antivirus software providers for Windows may be found here.
The United States Cybersecurity & Infrastructure Security Agency (CISA) has a site with tips on how to prevent ransomware attacks and recommended steps to follow in case of a possible ransomware attack.
Google Chrome comes with Chrome Cleanup, a web browser feature that creates alerts when it detects unwanted software and allows the user to remove the software and return Chrome to its default settings.
If a decryption tool is not found, one option is to replace the hard drive and operating system and save the locked drive offline. A decryption tool for the ransomware strain may become available months later to free the data at that point.