When you plug in a physical USB dongle, the operating system’s USB stack assigns it a device path. The Multikey v1823 driver (multikey.sys) registers a filter driver above the standard USB stack. It monitors IRP_MJ_INTERNAL_DEVICE_CONTROL requests directed at the dongle.
While newer versions exist, v1823 is often cited as the last stable build that handles "multisession" (multiple virtual dongles on a single PC) without blue-screening the kernel. It strikes the perfect balance between compatibility for Windows 7-era software and stability on newer kernels.
Before you start, disable Secure Boot and Driver Signature Enforcement (Windows 8/10/11). You can do this temporarily via:
Shift + Restart -> Troubleshoot -> Advanced Options -> Startup Settings -> Disable driver signature enforcement.
Step 1: Remove Old Drivers If you have previous versions of Multikey or similar emulators installed, clean them out first.
Step 2: Install the v1823 Core
Run the install.cmd (or multikey.exe) as Administrator.
Step 3: The Registry Tweak
v1823 often needs a manual registry edit to recognize specific *.dng (Dongle) files.
Navigate to:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Multikey
Create a new DWORD (32-bit) Value:
Step 4: Loading the Dump
Place your .dng or .reg dump file in the installation directory (usually C:\Program Files\Multikey).
Restart the Multikey service via command line:
net stop multikey
net start multikey
When you plug in a physical USB dongle, the operating system’s USB stack assigns it a device path. The Multikey v1823 driver (multikey.sys) registers a filter driver above the standard USB stack. It monitors IRP_MJ_INTERNAL_DEVICE_CONTROL requests directed at the dongle.
While newer versions exist, v1823 is often cited as the last stable build that handles "multisession" (multiple virtual dongles on a single PC) without blue-screening the kernel. It strikes the perfect balance between compatibility for Windows 7-era software and stability on newer kernels.
Before you start, disable Secure Boot and Driver Signature Enforcement (Windows 8/10/11). You can do this temporarily via:
Shift + Restart -> Troubleshoot -> Advanced Options -> Startup Settings -> Disable driver signature enforcement.
Step 1: Remove Old Drivers If you have previous versions of Multikey or similar emulators installed, clean them out first.
Step 2: Install the v1823 Core
Run the install.cmd (or multikey.exe) as Administrator.
Step 3: The Registry Tweak
v1823 often needs a manual registry edit to recognize specific *.dng (Dongle) files.
Navigate to:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Multikey
Create a new DWORD (32-bit) Value:
Step 4: Loading the Dump
Place your .dng or .reg dump file in the installation directory (usually C:\Program Files\Multikey).
Restart the Multikey service via command line:
net stop multikey
net start multikey
