Its still not available on the maintrack, rumours were that it should have been made available yesterday but Microsoft hasn't decided to release it yet: [URL]
I am using laptop dell inspiron 15 5558 with windows 8.1 pre-installed in it. I wanted to reinstall the windows but I didn't have any recovery media. Also I am unable to create a new recovery media from Dell Backup and recovery. Also I am unable to open feel backup and recovery from boot menu as this error comes to screen
Help needed with 0xc0000001 error while opening DRAB from boot menu and also 
unable to create recovery file from Dell backup and recovery.