New
#11
As a user of computers for 40 years, and having a business that can't afford any downtime a paid for version would seem to be what you need. "Can't afford any downtime" doesn't lend itself to using free versions of anything, probably be best to clone your existing system every (insert time period here, hour, day, week) to another drive. Something happens, you swap the defective with the good and you're back in service.