Well, it took me a while to get round to download Knoppix but when I finally found the time a couple of days ago it all worked like a dream! My 770 is up and running again with the latest 2.0 release. Thanks again for your help.

Mine has started again doing it last Friday and just aftyer 3-4 resets the screen was gone (white screen of death) :-(

Now I sent it back to Nokia

reset defaults
 

When we restore from backup, sometimes old settings conflict with the new OS.

My 770 was rebooting endlessly, but it was due to using my old Virtual memory on the mmc. I had to go into the Control Panel and choose 'Restore All Defaults' which turned off the Virtual Memory for me because my 770 would reset before I could uncheck it myself.

Then, I reformatted my Virtual Memory from the new OS, and I never had another reboot problem thereafter.

Good luck!