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I am getting a blue screen of death as I try to boot into Windows 7. The BSOD error code is: STOP 0x000007b

System specs: Intel i5 ATI Radeon 7750 HD Windows 7 Home Premium

What could be causing this error?

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Advanced troubleshooting for "Stop error code 0x0000007B (INACCESSIBLE_BOOT_DEVICE)" errors in Windows XP is probably what you are looking for... –  user1055604 Dec 30 '12 at 6:53
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1 Answer

Bug Check 0x7B: INACCESSIBLE_BOOT_DEVICE

http://msdn.microsoft.com/en-us/library/ff559218%28v=vs.85%29.aspx

The INACCESSIBLE_BOOT_DEVICE bug check has a value of 0x0000007B. This bug check indicates that the Microsoft Windows operating system has lost access to the system partition during startup.

Which HDD do you use? Have you changed the SATA mode from IDE to AHCI? If yes, check this:

Error message occurs after you change the SATA mode of the boot drive http://support.microsoft.com/kb/922976

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