Well, I got my Dingoo, and of course, I put Dingux on it...and all was happy until I had an odd sort of problem. I hooked the Dingoo up to my computer at work...and shortly after that...it would not boot in Dingux anymore. It would freeze up trying. It would still boot the native firmware, but not Dingux...it would freeze on the Dingux screen if I tried (the starting Dingux screen now, not the one with the birdie on it.) Well, I had noticed when I had hooked it up at work, it had done the thing at the bottom about China Chip again. I think it maybe re-installed the damned China Chip on me. Anyway, somehow or another, I managed to get Dingux coming back up by playing around a whole bunch, don't even remember everything I did...but...when I DID get Dingux to boot up again...and went into MAME4ALL...some of the MAME's I had..which HAD been working fine....suddenly were not working, anymore...they were suddenly missing files again!! I ought to mention, at this point that...prior to the Dingoo not booting Dingux, I had also changed the DIP Switch on one MAME game - but I don't think, and can't believe that would have caused any problem...just making a game give me six lives instead of three! I think the problem came from putting it on my boss's computer...and it re-installed the damned China Chip. ANYWAY...so now it was booting in Dingux again, but some of the MAME files had gotten corrupted. THEN...out of nowhere...BANG!! Again, it refused, all of a sudden, to boot up in Dingux...I do not remember if it was before, or after, I then hooked the Dingux back up on my HOME computer...mainly in order to re-load the extra files to make my MAME's work again. I remember that, when I DID hook it back on my home computer, again...it went thru the same damned thing about the China Chip. It would also show both disk drives The Dingoo Internal and the Dingoo Card...as being full...with zero capacity....and nothing on the systems would show up....even though it still would boot up normal in the native firmware. SO...I uninstalled the damned China Chip again. NOW, again, it seems to be working, it boots in both native and Dingux firmware. The corrupted MAME's have all been fixed up again now...and all seems wel. NOW, when I hook it at home, it does what it's supposed to do...and doesn't mention anything about the China Chip...it asks me what I want to do with, in my case, Drives I: and J: and I just close the dialog windows, and no problem...everything is there now. I know that I am NEVER AGAIN going to hook this up to any but my own home computer, so that the China Chip doesn't try and come back. But....folks...could that have been the cause of my problem, or not? I'd like to know...and others who have the China Chip ought to know about it, too. Meanwhile...I was wondering...as an aside...what would happen...if I were to re-download, and re-install Dingux again...and re-flash it....all from step one...except I would not format the SD card, since I already have one. Would that cause me to lose anything I had put in the Dingoo Internal memory?? Like all my MAME's? (I backed up all the copies of the working MAME's now) I am seriously considering re-flashing my Dingoo if this problem happens again...but I'm wondering what if any, negative side effects would come from the re-flashing. And i that would likely solve the problem? Like I said, I know that I never had ANY problem with the dual booting....until I had done those two things... One...hooked up to a different computer, and got the dialogue again about China Chip, and Two...changed the setting of one DIP Switch on one MAME game, to give six lives instead of three. I just need to know what anyone who is in the know thinks might have caused this problem....if anyone else has had it...and if so...how do I avoid it in the future, and how do I fix it permanently, so it won't ever happen again? Anyone out there, please help with this perplexing problem...could it be that, if you DID have the China Chip...that you NEVER EVER want to hook it up to any other computer, other than the one you used to originally flash it with Dingux? That's the sort of thing a Dingoo user ought to know about!! Like I said, it was weird...like I had "half-bricked" the Dingoo. Yet, somehow, I did manage to un-brick it, too.