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I installed Ubuntu 13.04 with a USB Flash Disk since I did not have a DVD Disc. I chose Install alongside Windows 7 and followed the process. After it had the popup screen with Continue Testing and Restart Now, I clicked Restart Now and removed the Flash Drive. The PC continued to boot to Windows 7 even though it was supposed to pass Grub first. I already tried re-installing Grub on the ext4 partition but still no luck and it ended up making my Windows 7 Boot Manager unusable too.

System: Windows 7 Ultimate 64-bit 4GB of RAM AMD A4-5300 (with AMD Radeon 7480D IGP) 80 GB HDD Space (11.9 GB for Ubuntu) Gigabyte GA-F2A75M-HD2

Tried to install: Ubuntu 13.04 amd64

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Try EasyBCD. – Mitch Sep 2 '13 at 14:33
Well, what do you mean of “re-installing grub on the ext4 partition”? Did you change the boot device from your harddisk to a specific partition when installing? – AliNa Sep 2 '13 at 17:05
up vote 0 down vote accepted

@ALL: Very similar question to this one, though the messed-up Windows MBR is different.

@Andrei: Anyways, your problem is actually pretty common, try reading the link I mentioned above and this one: How can I repair grub? (How to get Ubuntu back after installing Windows?). Hopefully they will help you solve your problem.

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