The Best Nuance Dragon Naturally Speaking Home Edition 13.0

How do I know if this is compatible with my computer?

I used a voice software (Dragon Voice?) some 15 years ago and eventually gave up due to the error rate. How has the technology improved?

Confused re answer about mac compatible nuance site says supported operating systems : microsoft windows 7, 8.1, and 10 (32-bit and 64-bit)?

Does it work with a voice recording of a speach?