[bobkoure]

There's been a bit of dicussion about this problem - with some solutions for the 20G.
I have a 6G, got the white box with the message System Files Missing: To Restore the System Files, connect H10 to iRiver plus and tried a few things - one of which worked.

1) connect the H10 to your PC and run chkdsk /r H: (where H is the volume the H10 appears to be when connected)
2) Copy BL_H10.rom to H:\
3) Unplug the H10 from the USB connection, then plug it back in
4) Copy H10.mi4 to H:\System (which is a hidden folder - either enter the name directly in the Win Explorer navigator bar or set H: so you hidden files/folders are visible)
5) Unplug the USB cable.

My 6G came right back.

Note - I got the idea to try this from the "how to change your MTP player to UMS" in the wiki. Also - I suspect that steps 1, 2, and 3 are unnecessary - but those are the steps I followed (basically setting my H10 to UMS again, which, I was pretty sure, would replace the firmware that my H10 was complaining about being "missing"). The next time I have this problem (if ever) I'll try skipping those steps and see if that works...

I had BL_H10.rom and H10.mi4 on my PC, left over from converting my MTP player to UMS some while back.
Maybe someone can post a link to wherever they are now?

PS: both iriverFirmwareUpdate r.exe and Iriver Plus were of no help. Maybe there's a separate "recovery tool" that I don't know about?