@Moby Dick have you considered that you may have issues with your own installation? So far the feedback on Windows 10 is fantastic. I have certainly come across no issues with it myself yet whatsoever, and reports from my customers are generally good ones. You say it has got to be the most untried OS ever released, but that isn't true. Millions of people worldwide used a pre-lease version and took part it ironing out kinks etc. And it's not free because they don't want paying for it, it's free because they'll make money through store purchases just like Apple do from now onwards. I don't think 8 was unstable either, just an awful layout compared to 10. This is what makes me think you may have underlying issues with your own PC. Can you define the instabilities you're seeing? It's made me curious.