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Grub messed up on dual boot machine - can't boot live usb

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http://askubuntu.com – I have a laptop on which I had Win 7 and Ubuntu 12.04 installed. The hdd has two partitions (one primary and one extended). Grub wasn't loaing initially so I ran the boot disk repair tool which seemed to sort it out. However, I mistakenly removed python (long story) from the Ubuntu OS and this obviously messed up Ubuntu a lot. So I decided to reintsall both Win7 and Ubuntu 12.04 in an attempt to get things back fresh. Win 7 went fine, but now when I try and use the Live USB to install Ubuntu I get: error: no such device: grub rescue > I guess grub is still there despite the Win 7 reinstall (HowTos)

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Submitted by missing on 09/19/2012

Stories similar to Grub messed up on dual boot machine - can't boot live usb

So I have 2 hard drives a HDD 320GB and a SSD 20GB. Before I had Windows 7 on the HDD and Ubuntu on the SSD but wanted to get rid of windows and reinstall a clean Ubuntu on the SSD then use the HDD for storage.

So I deleted everything from the HDD and set up the SSD with 18GB ext4 and 2GB Swap and installed Ubuntu on the 18GB ext4.

I have a dual boot of Win7 and Ubuntu on my HP laptop. I upgraded from Ubuntu 11.10 to 12.04 today and on restart I got a different black Grub screen instead of the usual purple one. (GNU GRUB version 1.99-21ubuntu3.1) Each boot option only returns error messages.

[Windows] EFI and Win7+Ubuntu 34 weeks 4 days ago

I've done something stupid.

When I first installed Ubuntu, things went mostly fine, the machine had Windows 7 installed already and I wanted to add Ubuntu. EFI made a bit of a mess of things, long story short I booted into a live session and used boot-repair to fix GRUB for me.

This made GRUB list 4 Windows boot alternatives and the usual two Ubuntu options.

Then I did something stupid.

I've bought new laptop Sony Vaio E14P series. It has pre-installed Windows 8, and I want to dual boot it with Ubuntu 12.10 64bit. I have diabled secure boot and install Ubuntu without any problem from live USB.

When I reboot after installation, it directly boot to windows 8, dont load GRUB at all. So I went to live USB again to boot-repair.

I tried to delete old ubuntu on dual-boot via win7 to get more win space (partition had non-ajacent NTFS free disk partitions and woldn't allow me to move in either gparted or win) and reinstalled ubuntu with alongside windows selected. I left about 1/2 NTFS and 1/2 ext3 before reinstalling ubuntu.

So I bought a brand new hard drive and put Ubuntu 12.04 on it. Then I decided to replace it with Windows 7, and I overwrote the entire Ubuntu partition. Now I am wanting to set up Dual Boot, but when I try to boot with the Ubuntu Live CD I get the following error: error: no such device: 3807.. grub rescue>

Any help would be GREATLY appreciated..

Hi, thanks for reading! Here's my tale of woe... I was dual-booted Win7 adn Ubuntu and tried to partition some space from D to C drive. I used a free software tool to do this with, and somewhere along the line it said "reboot". When I did, I got the dreaded: error: unknown filesystem -- grub rescue>.

Hi everyone, hope someone can help me...

I'm using a dual-boot setup and had to reinstall WinXP. As expected, this messed up GRUB (XP overrides it?), so I booted my Ubuntu Live CD, installed and ran boot-repair with the "recommended repair" option. I think it reinstalled GRUB for me, not sure.

Following a fresh install of 12.04 on a dual HDD dual boot system first boot brought up Grub Rescue.

I installed Boot Repair in a live CD and ran the recommended repair. Boot Repair indicated a successful repair.

Upon reboot there is no entry for Win XP.

Gparted shows sda as full as it was before installing 12.04.