Moved to Forum: Original Link
Free in 1st year after release.
no link available yet.
Release date will be announced later.
source:http://m.au.ign.com/articles/2015/01/21/free-upgrade-to-windows-10-for-first-year-after-release
Mod: Announcement with no pricing, dates, link, or confirmed availability to Australia.
Apparently a MS employee posted on Reddit and noted that it was an internal coding issue. Developers request the OS version for various reasons in code but the issues is that the "9" is already partially used by Windows 95 and 98 (Windows 9x). This could cause issues with older legacy programs.
[Edit] www.reddit.com/r/geek/comments/2i0g19/microsoft_dev_explaini…