http://www.itpro.co.uk/operating-systems/23119/windows-10-release-date-and-specs Free upgrade for users of Windows 7, 8.0, 8.1 in first release year. Charges (not a subscription) applied for upgrade after that. Capable of running both iOS and Android apps. The 'last OS' Microsoft ever proposes to make. Internet Explorer will be replaced by something closer to Chrome, and hopefully less susceptible to hackers, malware, and security threats. I generally approve, but if this version of their 'last OS' still has a registry, and/or requires me to run something like MalwareBytes and/or SuperAntivirus, CCleaner every day, I think I'll pass. When you add up all the time and effort required to do those things you have to do to keep your computer safe, and all of the processing power it takes to do that, think of how you could be using some of that time and processing power for getting more of YOUR OWN work done faster instead of protecting Microsoft's security hole ridden OS. Is it really worth it? Macs cannot be used in our government because we still have a nuclear arsenal. And thanks to Microsoft the Chinese just hacked info on every government employee. To give it to their new friends the Saudis. Thanks again, Microsoft. I use a Mac every day. No such worries about malware or viruses. Ever. I do continuously ride herd on the number of super cookies being set in my browser. Super Cookies are another Microsoft innovation to "enhance your browsing experience". I say we all ditch them for good. Use Linux if you don't like Apple.