I have (had?) a dual boot system with Win 7 and Ubuntu. Tried upgrading my ubuntu partition from U10 to U12.
Currently when I try to boot up my PC I get a grub command prompt. No idea what to do. If i boot with the Live CD and use sudo fdisk -l i do not get anything useful it says throughout "Disk /dev/sdb doesnt contain a valid partition table"
What on earth do I do to
1) Make sure I can still get into my Windows 7 OS? (even if it means deleting all traces of Ubuntu)
2) Get a new Ubuntu 12 installed???
EDIT I used GParted and deleted my linux partitions, restarted PC and then grub couldnt find anything.... (I thought I had deleted grub and expected windows to boot...)