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My laptop had Ubuntu pre-installed in it. I installed Windows 7 from USB by following the steps from How can I install Windows after I've installed Ubuntu?

Windows booted fine before I ran boot-repair. However, after I installed and ran the boot-repair from the Ubuntu live CD, Windows has stopped booting. Just a blank screen appears and nothing happens. What to do?

Thanks in advance.

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up vote 1 down vote accepted

Not an answer, but because that's too much for putting it into a comment. You can read more on all of these popular threads.

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Thanks for your answer. But, I'm not installing Ubuntu on pre-installed Windows, I'm doing the other way round. Plus, It's WIndows 7 so it doesn't have the UEFI issues :-) – R4chi7 Aug 3 '14 at 10:23
No worries. I guess at least three from the list for your case nevertheless: How can I install Windows after I've installed Ubuntu?,Windows 8 removes Grub as default boot manager, Windows 8 deletes GRUB when booting – Ruslan Gerasimov Aug 3 '14 at 10:28

Just a suggestion, and that should solve your issues as long as you don't mind wiping your disk or having the trouble of backing up / moving files around between systems.

Best choice would be to wipe your disk, install Windows first using the first partition and then Ubuntu alongside it.

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ha! That is a very expensive option for me ;-) Anyways, I don't know how, but Windows starts properly on every second reboot. I'll try to deduce the trick behind this magic! – R4chi7 Aug 5 '14 at 15:20

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