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I have dual boot Lenovo laptop g580. I have already Windows 7 and Ubuntu 12.04 32-bit installed .

I want Ubuntu 12.04 64 bit that's why I tried to reinstall Ubuntu 12.04 64 bit in place of 32 bit.

After installation I got restart now. Then I got:

grub rescue > with invalid ETL

Even I am not getting Windows boot also.

Please help me to get bootloader.

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Boot your Ubuntu using SuperGrubDisk2 (http://www.supergrubdisk.org/ download the iso and burn it to a CD, then boot from it) and reinstall the bootloader:

  • sudo update-grub
  • sudo grub-install /dev/sdX where "X" is the drive letter of your boot-disk (normally "a")

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