UPDATED: Fix for Call of Duty: Call of Duty Modern Warfare 3 Crashing (Error 0x1) (Windows 11/10)

So I got the battle pass today to try BO6, and to my surprise, the game would start and crash 3 seconds in. I went online to check if anyone else was having this problem, and surprise surprise, a ton of people are experiencing this issue. It's been persistent for more than a month with no official fix from any of the Activision devs.

Click this for the video link if you are having trouble following up

How to Run the Call of Duty Randgrid Service Setup Script

1. Copy the script into a new text file.

2. Save the file with a .bat extension (e.g., "cod_service_setup.bat").

3. Right-click the .bat file and choose "Run as administrator".

4. When prompted, enter your Call of Duty Xbox app installation folder.

5. The script will: Remove the existing service if found Install the Randgrid service Update Randgrid permissions

6. If you see any error messages, make sure you're running as admin and the folder path is correct.

How to Manually Set Up the Call of Duty Randgrid Service

NOTE: ONLY DO THESE STEPS IF THE WINDOWS 11/10 SCRIPT PROVIDED BELOW THE MANUAL STEPS DO NOT WORKS. DO NOT RUN BOTH

1.Open Command Prompt as Administrator.
2.Check if the service exists:

sc query atvi-randgrid_msstore

3.If it exists, remove it:

sc delete atvi-randgrid_msstore

4.Install the Randgrid service:

sc create atvi-randgrid_msstore type= kernel binPath= "C:\XboxGames\Call of Duty\Content\randgrid.sys"

(Replace the path with your actual installation folder)

5.Set the service permissions:

Windows 11

sc sdset atvi-randgrid_msstore D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWRPWPLOCRRC;;;IU)(A;;CCLCSWLOCRRC;;;SU)S:(AU;FA;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;WD)

Windows 10:

sc sdset atvi-randgrid_msstore D:(A
;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU)

Note: Make sure you have the correct path to randgrid.sys before running these commands. Do not run both the manual steps and the automatic script only run one or the other.

WINDOWS 11 SCRIPT IF YOU DO NOT WANT TO DO THE MANUAL STEPS

echo Please enter the Xbox app installation folder for Call of Duty.
echo For example: C:\XboxGames\Call of Duty
set /p INSTALLDIR="Enter the folder location: "

sc query atvi-randgrid_msstore >nul 2>&1
if %errorlevel% == 0 (
    echo Service atvi-randgrid_msstore was found, removing...
    sc delete atvi-randgrid_msstore
    if %errorlevel% neq 0 (
        echo Failed to remove the service. Please run this script as an administrator.
        exit /b
    )
) else (
    echo Service atvi-randgrid_msstore is not installed.
)

echo Randgrid installing
sc create atvi-randgrid_msstore type= kernel binPath= "%INSTALLDIR%\randgrid.sys"
if %errorlevel% neq 0 (
    echo Failed to create the service. Please check the folder path and run this script as an administrator.
    exit /b
)

echo Updating Randgrid permissions
sc sdset atvi-randgrid_msstore D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWRPWPLOCRRC;;;IU)(A;;CCLCSWLOCRRC;;;SU)S:(AU;FA;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;WD)

WINDOWS 10 SCRIPT IF YOU DO NOT WANT TO DO THE MANUAL STEPS

@echo off

echo Please enter the Xbox app installation folder for Call of Duty.
echo For example: C:\XboxGames\Call of Duty
set /p INSTALLDIR="Enter the folder location: "

sc query atvi-randgrid_msstore >nul 2>&1
if %errorlevel% equ 0 (
    echo Service atvi-randgrid_msstore was found, 
removing...
    sc delete atvi-randgrid_msstore
    if %errorlevel% neq 0 (
        echo Failed to 
remove the service. Please run this script as an administrator.
        pause
        exit /b
    )
) else (
    echo Service atvi-randgrid_msstore is not installed.
)

echo Randgrid installing
sc create atvi-randgrid_msstore type= kernel binPath= "%INSTALLDIR%\randgrid.sys"
if %errorlevel% neq 0 (
    echo Failed to create the service. Please check the folder path and run this script as an administrator.
    pause
    exit /b
)

echo Updating Randgrid permissions
sc sdset atvi-randgrid_msstore D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU)

echo Service installation and configuration completed successfully.
pause