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When my computer starts up, it goes to a purple screen. I can go to the Ubuntu side just fine, but when I choose Windows 7 it says:

error: invalid EFI file path.
press any key to continue...

So what is wrong?

yes, the boot repair worked, thank you!

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Did it work recently? If yes - what have you changed? If no - have you installed a new system? Have you installed ubuntu after Windows? Do you have different paritions for your installations? The Windows 7 EFI is the windows 7 system partition. It seems grub2 is unable to find this partition (Usually a 100 MB partition labeld as system partition). So basically .... tell us more details about your system – Grrbrr404 Nov 30 '12 at 11:12

Obviously you need to repair your EFI booting.
It can be happens if:
1. Was reinstalled system.
2. Your UEFI partition was broken, formatted, or erratic cleaned.

Exist nice solution for this:

Open your terminal and type:

sudo add-apt-repository ppa:yannubuntu/boot-repair && sudo apt-get update

Press Enter key, and wait for completion. Then type:

sudo apt-get install -y boot-repair && boot-repair

Again press Enter key, wait for install completion and program running.

For next steps refer to this links:

Ubuntu Documentation - Boot-Repair
Boot-Repair project

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