Problem recreating BCD on Windows 7 64bit - The requested system device cannot be found
Problem
NVIDIA drivers upgrade crashed my Windows 7 installation, so I'm working to undo the damage. What I can do: I can boot Windows install from the USB drive, and I can boot the Hiren's Boot CD. Although automated Windows repair fails, I can get to command prompt when I boot Windows install from USB drive, and I can see my drive and all my data. What I cannot do: I cannot boot into Windows - I get this message: It seems that something is wrong with my /Boot/BCD, so I'm trying to recreate it from scratch. I've tried all the methods detailed here (including Windows repair which fails), and I'm left with the last one (near the bottom of that page). When I type the following command as in the tutorial: ...it fails with the following error: Many Google results say that I must use diskpart to set my partition active, however it's already set as active. Also, when I try this: It fails with similar message: Does anyone know what does that error message mean, and what is the requested system devic…
Error Output
Windows failed to start. A recent hardware or software change might be the cause. To fix the problem: 1. Insert Windows CD and run a repair your computer option. File: /Boot/BCD Status: 0xc000000f Info: an error occurred while attempting to read the boot configuration data.
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1 Fix
Fix for: Problem recreating BCD on Windows 7 64bit - The requested system device cannot be found
Not directly related to your issue as you resolved it, but rather to your original description (particularly "The requested system device cannot be found." on BCD operations despite all attempts to recreate/rebuild): This error can happen if you are booting from a USB stick, and your BIOS supports a given usb slot, but the windows PE/repair environment does not! I spent two days pulling my hair out, wrestling with this issue (the BCD store was ALWAYS unavailable with this "The requested system …
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