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"Error loading operating system" in windows 7 bootcamp

Hello, Im trying to boot up my windows 7 and its giving me "Error loading operating system". But the wierd thing is from Mac OS X i can access my bootcamp without any problem "browsing it", all my music is on it actually. Any solutions guys?

Windows 7

Posted on Jan 12, 2012 8:16 AM

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10 replies

Feb 6, 2015 1:52 PM in response to The hatter

Hi guys,


Sorry to resurrect an old thread, but I am suddenly having a very similar problem and maybe one of you can help me. I have searched the problem using many different phrases but have not found a solution to my specific issue anywhere so I turned here.


Problem : I am getting the "Error Loading Operating System" error on the windows side after trying to boot up using BootCamp.


More Info / History : Everything was running fine until I updated OSX to 10.10.02. I have an unsupported card with no EFI : GTX 980 so I couldn't tell what was going on with the update but it just hung in black screen for a while and then when into an infinite restart-loop. Sooooo, I pulled the card and put my old GTX 120 with EFI back in to see what the **** was going on and miraculously it decided to finish the update. (Maybe it had something to do with the unsupported card? IDK) The update finished successfully after i swapped out the cards but I fear i screwed up something by restarting during the update (I was hung up, I waited a very long time before hitting the power button). OSX is running ok, I put the other card back in and it is working ok now, but... BootCamp was working... once. Then I restarted and it wouldn't work, I got the error message. So I tried doing a verify/repair disk on both drives, OSX and W7, and that didn't do anything, so I tried to start BootCamp assistant and I couldn't... So I reset the PRAM and that fixed the problem with BootCamp Assistant, so now that starts up, but I don't know if I can repair the issue with it? However I still can't boot into Windows. Again, when I hold down option on boot, I do get the menu (BootCamp?) to choose which OS to go into. Side Note, when I pick Recovery Mode from that menu, I get the mac error message and it restarts.


All the W7 Files are still present on the drive... Is there any way I can back up the image, re-prep the drive for BootCamp and re-image it to repair it? All thoughts, suggestions, etc. welcome.


Hardware:

• Upgraded 2009 Hex-Core Mac Pro flashed to 2010

• OWC PCIE SSD - OSX 10.2.2 installed here

• nVidia GTX 980 - EVGA

• 1TB HDD - 1 Partition - Windows 7 installed here (Bootcamp)

"Error loading operating system" in windows 7 bootcamp

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