used GParted live cd and now it won't boot

Hello, not sure if this is the right place for this question, feel free to move it!

I run Lubuntu but wanted to install Windows. So I used GParted Live CD to shrink the Linux partition and create a new Windows partition. Then I installed Windows on that partition fine and it boots. Then to get back into Lubuntu I used GParted to change the boot flag from the Windows partition to the Linux partition, but now it won't boot and says Error loading Operating System. Help? :(

Quote:

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Originally Posted by JooMn

I run Lubuntu ..Then I installed Windows .. now it won't boot and says Error loading Operating System. Help? :(

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How to Restore Grub

Got it in one, thanks dgharmon :D

to anyone else with the same problem, when the posts above says
sudo grub-install --root-directory=/mnt/ /dev/sdX
#replace the X in sdX with your partition alphabet

remember to NOT put any numbers after sd, just a letter!

Other than that the instructions work perfectly.

[QUOTE=JooMn;12463986]Then to get back into Lubuntu I used GParted to change the boot flag from the Windows partition to the Linux partition .../QUOTE]
In the future, you need to know that Windows REQUIRES the boot flag to be on the partition containing the Windows boot loader files -- or it will not boot. Linux doesn't use the boot flag -- so basically, there was no need to move it.