I have a 1st-gen xbox.
Been getting nasty errors like the one shown above as well as the dirty-disc error. I get the "unexpected problems" error most on Ghost Recon and I get it almost every session.
The dirty-disc error occurs on every other game. Brand new games, old games, clean games, it doesnt seem to matter.
I've already checked the possibility of faulty discs, dirty discs, dirty lens, heat, corrupted saves, and an assload more. It's none of those.
Turns out that early xbox's are shipped with a Thompson DVD drive. Apparently a batch of these drives are faulty and will error on games. Sometimes it takes a while for them to act up. If you look on
http://forums.xbox.com you'll notice that this isnt an issue that Microsoft can ignore. Although they havent recalled any or made any sort of announcement, if you call 1-800-4myxbox and tell the rep the errors you get and how you get them, they might offer a free repair. I mentioned that I did some homework and found all this info online and knew that they were doing free repairs due to this matter (even if the xbox's warranty has expired like in my case). I had to call 2 times to get the auth for a repair, but I got it, and no, I didnt have to act angry. I think I was being rather polite, actually.
This is how the return works. Once authorized, they will send you a box that should show up within 4 working days. You put your xbox in it (sans controller, cables, game, etc). Pack it up just like the included instructions tell you to. Call the number thats on the instruction sheet (its Airborne Express.) A courier will come pick up the box for you. No need to go to a mail center unless you cant be there to give the box to the rep and you dont want to leave it on your porch.
Apparently the repair takes only a day or two then they ship it back. I actually am expecting mine back any day now. I called the xbox hotline wondering the status on my xbox repair and they tolr me its on its way back to me and gave me the tracking number so I can see for myself. Sure enough, it should be back on the 21st.
Hopefully it'll work when I get it back.
Hope this helps, too.
If you call, good luck.