Noremac999 :
I'm building a PC in a few days and I want to know if I can get windows 10 for free if I install the technical preview without a copy of windows 7/8. I've recently heard a lot about Microsoft making and going back on promises about that, so can I?
Yes. sort of. As above, to continue using it, you have to remain a participant in the Insider Program. And basically be a permanent beta tester.
More info here:
http://blogs.windows.com/bloggingwindows/2015/06/19/upcoming-changes-to-windows-10-insider-preview-builds/
Specifically:
“I want to opt out of the Windows Insider Program on 7/29.” If you decide to opt-out of the program and upgrade to the 7/29 build you will be subject to exactly the same terms and conditions that govern the offer* that was extended to all Genuine Windows 7 and 8.1 customers. This is not a path to attain a license for Windows XP or Windows Vista systems. If your system upgraded from a Genuine Windows 7 or Windows 8.1 license it will remain activated, but if not, you will be required to roll back to your previous OS version or acquire a new Windows 10 license. If you do not roll back or acquire a new license the build will eventually expire.