Connected phone to pc in Sync mode to update from latest PC Studio version.
Took an a g e to download the update, then off it went with the phone.
About 20% in (Total progress) I got a disk warning on C: (Sytem drive) then the update fell over
Red screen on phone etc.
Tried to do recovery, but following instructions on the screen (keys 4+7 didn't work!) phone would not switch on.
I tried switching it on again & repeating the update - always got to 20% Total progress and stalled.
Had a read on this forum around this topic, but could find no previous on this.
Then I noticed that another poster did other key combos but included the power key... I tried this with the 4+7+Pwr. Jackpot.
Ran update again, and all went OK.
I suspect that the disk full was responsible for the original failure.
I hope this helps others, check your free disk space.
Cheers,
Mike.

