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[Q] Xperia V not detected in Windows 8.1

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By LeParkour012, Senior Member on 24th January 2014, 02:02 PM
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My Xperia V is not being detected in Windows 8.1. It's only detected when using MTP or MSC, not Flash mode of fastboot mode. Before you start throwing "You must disable Driver signature enforcement" at me, flash and fastboot works for my Xperia Z1. I'm trying to relock my Xperia V's bootloader so I could give it to my uncle. Look at the attachment to see what message I got from Windows when connecting.

At first I thought having CM11, 4.4 kitkat was the problem. So I flashed a stock-based rom and kernel. Still no success.
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24th January 2014, 07:50 PM |#2  
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That's interesting, as I've read a few times in different threads that Windows 8.1 simply won't allow the fastboot/flashmode drivers to be installed correctly (even with disabling Driver Signature Enforcement). I assume you have tried using different USB ports on your machine (and possibly even a different cable?)
24th January 2014, 08:00 PM |#3  
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It does not work on windows 8.1, due to Microsoft changing the USB stack to their own prohibitory driver. Microsoft have announced that there will be a fix in Feb, lets hope they keep to their word.

I have broken my windows 8.1 install many times trying to hack the USB stack, with Windows 8 specific drivers, but it's a no go. I guess we will all have to wait until the is an official fix from Microsoft in this respect.
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25th January 2014, 04:17 AM |#4  
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I don't get why I can get my Xperia Z1 to connect but not my Xperia V :/

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25th January 2014, 05:55 AM |#5  
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The Z1 is a year newer than the V... Maybe sony made the Z1 fastboot and flashmode more compatible with win8.1?


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25th January 2014, 06:04 AM |#6  
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Could be :/

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