[Windows Phone 8 General] bruggesboy:
Oké guys, i had the same problem.

Phone not detected by the Windows Device Recovery Tool, so nothing this tool could fix...

BUT, i got my Lumia 925 fixed.

This is what i did:

1) Go to device manager -> Universal Serial Bus Devices -> QHUSB_DLOAD -> uninstall driver

After this, you should see an exclamation mark to the left of your QHUSB_DLOAD device.

2) I've downloaded the Lumia_WP8x_Drivers.7z from here: link : server2.infinity-best.com/download/index-1.php?dir=software/Drivers/&file=Lumia_WP8x_Drivers.7z

(Chrome gives you a hard time downloading this file, just use IE)

3) Extract the 7z file with 7zip, and execute the EmergencyDownloadDriver.msi

I did it as administrator, and followed the following guide to allow to install unsigned drivers (not sure if needed):

link: makeuseof.com/tag/how-can-i-install-hardware-with-unsigned-drivers-in-windows-8/

4) At this point in the device manager, your QHUSB_DLOAD device should be gone from the Universal Serial Bus Devices, and a new name appears (can't remember which it was)

5) Go to here:

link: lumiafirmware.com

6) Pick your device, in my case, i picked the RM-892 - Lumia 925

7) Pick your firmware type, i picked 059T618 - RM-892 VAR MVP EURO BE LU GREY

8) At the top right of the page, i clicked on the firmware (3051.50009.1424.0004), which expanded a new section where i could download my *.ffu file

(RM892_3051.50009.1424.0004_RETAIL_eu_belgium_350_04_438242_prd_signed.ffu)

9) At the bottom right corner of the page, download the "Emergency files":

FAST8960_CATWALK.hex

RM892_msimage_v1.0.mbn

10) Download and install the Windows Device Recovery Tool:

link: download-fds.webapps.microsoft.com/supportFiles/phones/files/recovery/WindowsPhoneRecoveryToolInstaller.exe

11) Connect your phone to your pc

13) Create a folder C:\Lumia

12) Navigate to the following folder in a CMD "C:\Program Files (x86)\Microsoft Care Suite\Windows Device Recovery Tool"

(Easy way: go to the path in an explorer, and type cmd in the address bar)

13) Execute the following command, but replace [FFU-FILE] with the path to the downloaded .ffu file:

thor2 -mode ffureader -ffufile "[FFU-FILE]" -dump_gpt -filedir C:\lumia\

This command creates 2 files in the c:\lumia\ folder (GPT0.bin, GPT1.bin)

14) Execute the following command, but replace [HEW-FILE] with the path to the downloaded .hex file :

thor2 -mode emergency -hexfile [HEX-FILE] -mbnfile C:\lumia\GPT0.bin -orig_gpt

That resulted in the following error message:

15) So i thought crap, but instead of creating the mbnfile ourself, lets use the one from the site we downloaded.

So i executed the following command where i replaced the [HEX-FILE] and the [MBN-FILE] with the paths to the corresponding downloaded files:

thor2 -mode emergency -hexfile [HEX-FILE] -mbnfile [MBN-FILE] -orig_gpt

Then i received the following error:

16) At this point, i crapped a second time. But! I unplugged my phone from the PC, Performed a soft reset (Holding Power + Volume down buttons until it vibrated).

And a miracle happend! My phone booted, Nokia appeared, but got stuck at the blue screen with the unhappy smiley...

17) Start the Windows Device Recovery Tool, connect the phone back to the PC, and voila, phone was recognized by the tool and resetting was started!

I'm am sure some steps are not needed, but i listed everything i did and hope this could help a lot of people...

Sorry for the links not being clickable, this is my first post, so not allowed to post links :)