I have a Lenovo Y560 laptop on which I installed Windows 7 and Ubuntu 11.10 as dual boot. Due to some reason I had to recover the boot loader using
bootrec.exe /fixmbr and
bootrec.exe /fix boot. It created one partition of size 198 MB named "tet" and both Ubuntu and Windows were working fine.
Yesterday while making some changes in the partition table I deleted that "tets" partition and after reboot I'm getting the following error
Error: unknown filesystem grub rescue>
I tried to boot from the Windows installer CD, but it get stuck at "Starting Windows", so I am not able to run the commands I have mentioned earlier and when I tried to boot from Ubuntu 11.10 (Oneiric Ocelot), it got stuck at this error:
Memory full Can't kill any more process.
How can I fix this problem?