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  • (01. January 2010., 10:27:49)












Author Topic: solution: "vmbus.sys" missing or corrupt at windows 7 halted boot (0xc0000221)  (Read 809 times)

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devnullius

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I first had a Windows 7 machine that halted boot with 0xc000000e.

I couldn't get it solved with the usual suspects (bios: AHCI vs IDE) (MSDaRT chkdsk, bootrec, and failing sfc because the machine needed a reboot), so I finally got the machine partially fixed with Macrium Reflect Recovery Repair Disc (v6.1, Windows 10). While it makes no sense (as far as I can tell it didn't do anything I didn't tried manually), I took the results nonetheless.

Because after that error and fixing it, I got a new error: "vmbus.sys" is missing or corrupt. Again, nothing I could do, not even command prompt. Sigh.

I found that NeoSmart Easy Recovery Pro for Windows 7 could fix this specific error. Instead, I found that it undid the work done by Macrium and rendered the system even less bootable than it was (just a black screen; nothing happened).

So after re-running Acrium, and re-creating vmbus.sys problem, I just went to another (luckily identical) machine and put the file from that c:\windows\system32\drivers\vmbus.sys on a USB drive. I then ran MSDaRT recovery console once more, copied the file to the failing system and hold and beyond, the system booted once more  :bih:

Very strange though. For an offline check disk did not find *any* problems. The filesize on the failing system was identical. It just doesn't make any sense why this system suddenly stopped booting. Once I replaced the file, Windows continued installing updates that were still awaiting a successful reboot. Nothing went wrong this time.

Sigh. But: yeay! Problem solved and posted here because Google did not show any relevant results for this specific query.

Download vmbus.sys for Windows 7 here: https://app.box.com/s/ptzt3ga9x6oe005gl7q4fjes7ttwud60

Peace!

Devnullius
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