[ubuntu] ubuntu 11.10 not booting..

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http://ubuntuforums.org – hi all, I am using ubuntu 11.10 along with windows7 previously I can boot to any of the OS. Now I am unable to boot ubuntu, only windows is booting. lastly when windows is booting it asked for checkdisk and I continued(it deleted some 2 files) from that moment I am unable to boot Ubuntu. In C: drive I have windows in E: I have ubuntu In either of these locations I can't find nothing(menu.lst) E:\ubuntu\disks\boot\grub\ E:\ubuntu\install\boot\grub\ main problem is I don't have CD drive to reinstall. but i have the copy of the CD in my windows pc. if anybody share their 11.10 (Hardware)