Blue Screen Breakdown: Fixing Error 0x00000092 “UP_DRIVER_ON_MP_SYSTEM” Once and for All
UP_DRIVER_ON_MP_SYSTEM, occurs when a uniprocessor-only driver is mistakenly loaded on a multiprocessor (MP) system.
What Is BSOD Error 0x00000092?
The Blue Screen of Death (BSOD) error code 0x00000092, also known as UP_DRIVER_ON_MP_SYSTEM, occurs when a uniprocessor-only driver is mistakenly loaded on a multiprocessor (MP) system. In simpler terms, a driver designed to run on systems with only one CPU core is being executed on a system with multiple cores or threads—something modern systems almost always have.
This mismatch triggers a critical system error that halts Windows to prevent potential damage or instability.
Understanding the Error: Breaking Down the Terminology
Uniprocessor Driver (UP Driver): A device driver built specifically for single-core processors. These were more common in early Windows operating systems.
Multiprocessor System (MP System): A computer system with multiple CPUs or CPU cores, which includes nearly all modern desktops and laptops.
Why It Crashes: UP drivers don’t properly handle concurrent processing or interrupt handling in MP environments, leading to instability or race conditions.
Causes of UP_DRIVER_ON_MP_SYSTEM
Outdated Drivers Legacy drivers that were never updated to support multiprocessor configurations.
Manual Driver Installation Installing old drivers manually, such as from a vendor’s CD or archive, can introduce UP-only drivers.
Windows Migration or Upgrade Issues Migrating a system image built for a uniprocessor system to multiprocessor hardware.
Faulty Custom Kernels or Embedded Systems Especially in enterprise or embedded environments, a custom kernel or a minimized Windows image (e.g., Windows Embedded) may load inappropriate drivers.
Incorrect Hardware Emulation Settings Virtual machines or emulated hardware with incorrect CPU settings may lead to UP drivers being loaded.
How to Fix Error 0x00000092
Step 1: Boot into Safe Mode
If the BSOD appears at startup:
Power on the device and force shutdown as Windows starts loading.
Repeat this 2–3 times until Automatic Repair launches.
Navigate to:
Advanced options → Startup Settings → Restart
Press 4 for Safe Mode
Step 2: Identify the Faulty Driver
Use the built-in tool:
Open Command Prompt (Admin) and run:
cmd
CopyEdit
driverquery /v /fo list > C:\drivers.txt
Check the output for suspicious drivers, especially those labeled as “Uniprocessor”.
Step 3: Uninstall or Replace the Driver
Press Win + X → Device Manager
Expand categories and locate the device using the outdated driver
Right-click → Uninstall Device
Restart your PC
Let Windows search for a multiprocessor-compatible driver automatically, or download one from the official hardware vendor site.
Step 4: Perform System File and Integrity Checks
Run these in Command Prompt (Admin):
cmd
sfc /scannow
Then:
cmd
DISM /Online /Cleanup-Image /RestoreHealth
These will ensure your system files and driver structures aren’t corrupted.
Step 5: Windows Update or Rollback
Update: Go to Settings → Windows Update and install the latest patches and driver updates.
Rollback: If the issue started after a recent update or driver installation, roll back:
Device Manager → Device Properties → Driver tab → Roll Back Driver
Step 6: Check CPU and Virtualization Settings
If you're using a Virtual Machine, make sure:
Multiprocessor support is enabled
The correct chipset/CPU emulation is selected
If you’re running on physical hardware, ensure BIOS/UEFI doesn’t restrict core usage.
Advanced: Clean Driver Slate with DDU
If driver issues persist, use Display Driver Uninstaller (DDU) or a general driver cleanup tool to completely remove conflicting drivers and reinstall clean ones.
How to Prevent BSOD 0x00000092 in the Future
Always download drivers from official sources
Avoid using old driver discs or software installers
Regularly update Windows and driver packages
Use Driver Verifier (advanced) to test for faulty drivers before they cause BSODs
Avoid cloning old Windows installations to new hardware without proper driver migration tools
Final Thoughts
BSOD 0x00000092 “UP_DRIVER_ON_MP_SYSTEM” is a classic case of old software meeting modern hardware. Fortunately, it’s fully resolvable by identifying and removing the incompatible driver. Stay vigilant with your driver sources, and regularly audit your system to keep legacy issues from creeping in.
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