I got the same thing. Blue-screen with error NTFS_FILE_SYSTEM. Booted into second partition running Windows 7, and it ran chkdsk, deleting some corrupted files on the W10 drive.
Now I get the OS Choice menu, but when I select W10, it goes to blank screen, no cursor, no drivers loaded, nothing. Hangs there permanently.
I left the PC running while it updated and had a blank screen when i returned, so hit the hard reset. Wonder if I interrupted the install (if it was still going on) and managed to leave a semi-updated OS....
Edit: all attempts at fixing with the install disk, including refresh, system restore, startup repair, checkdisk, and sfc error out.
- Edited by C Robinson 10 hours 16 minutes ago
I have the Windows 10 previews going on on 3 different computers: two desktop PCs and one laptop.
The upgrade went fine on the laptop and one of the desktops, but the other desktop ended up in the boot loop mentioned.
Haven't figured out why yet, but it seems to be dependent on the hardware. It did not make any difference if I upgraded from the previous build or from the initial one.