If your computer gets infected with ransomware then you will not be able to recover any files (including those encrypted by AxCrypt) because it is “encryption over another encryption”.
Keep Windows up-to-date with all of the recent patches, use a good quality antivirus program, use a good firewall, don’t open suspicious files and backup all of your data regularly.
Windows includes free backup software. You can find instructions below:
If you want a third-party solution use Personal-Backup:
Experts can use Clonezilla:
Whatever backup software you use, make sure you backup your files regularly and then use AxCrypt to encrypt your backup.