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[Q] Unlocking Bootloader (error "malfunctioning USB device", Windows 8, Neo V)

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ferivon
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(Last edited by ferivon; 26th May 2014 at 12:36 PM.) Reason: got it to worl on windows 7
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Default [Q] Unlocking Bootloader (error "malfunctioning USB device", Windows 8, Neo V)

I'm currently trying to unlock the bootloader of my Xperia Neo V using the official instructions: unlockbootloader.sonymobile.com/instructions
But I'm stuck at point 12/13. I can't correctly connect my device with the computer. I'm pressing Fastboot and pluging in the USB Cable (I tried it in every possible order and at the same time). Fastboot is the Menu-key on my device.
On Windows (8) I get the following error message:
At first I got an error saying that my decive is malfunctioning or so.
I tried to install the driver anyways. In every possible way I know of. But I keeps saying "error encounted while attempting to install".

What am I doing wrong?
I'm on Windows 8 Pro, my device is a Sony Ericcson Xperia Neo V (rooted, default ROM 2.3.4)
My computer has USB 3 only in case that matters.

Here are some screenshots of me trying to install the drive:
multiurl.com/ga/ScreenshotsNeoVFastboot

I hope you can help me. :/m

Best regards,
Ferivon

edit: I jsut realize that I never closed the error I got at first. Here is a screenshot: 250kb.de/u/140526/p/hrRGbwE1NWwk.png

edit2: I finally got a chance to test it on windows 7 and it worked instantly... just screw windows 8 ...
 
ferivon
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(Last edited by ferivon; 26th May 2014 at 12:52 PM.) Reason: posted a post in the wrong place
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Default ...

oops, wrong place
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