Mine is Pentium(D) Dual Core with Intel Mother Board 1 GB Ram + 15" CRT It is with Win98, XP and Ubuntu 9.04 Last time I upgraded from 8.04 to 9.04 without any problems. Now the installation CD of 9.10 did not allow to upgrade. I tried the update manager and commandline also and those also failed. Finally I tried for Web Upgrade. It went on around 7 hrs and after reboot show the following message and fails to boot. I tried sever attempts and recovery mode. Nothing helped me. init: sreadahead with process (2053) terminated with status 1 mountall:/proc: unable to mount: Device or resource busy mountall:/proc/self/mountinfo: No such file or directory mountall: root filesystem isn't mounted init: mountall main process (2054) terminated with status 1 General error mounting filesystems A maintenance shell will now be started CONTROL-D will terminate this shell and re-try root@arivukkadal-desktop:~# Control+D did nothing. Please help me to recover my system.