Fix ERROR_PAGE_FAULT_COPY_ON_WRITE In 6 Steps
Addressing underlying memory issues and file corruption
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Getting a 749 (0x2ED) Page fault was a demand zero fault error with a code ERROR_PAGE_FAULT_COPY_ON_WRITE signals disk space or system memory issues.
Below we’ll walk you through necessary steps like updating drivers, freeing up space, and more. By the end of this guide, the error should be gone.
Let’s get started.
How to fix ERROR_PAGE_FAULTY_COPY_ON_WRITE
1. Free up Disk space
- Open Command Prompt as an administrator
- Type: wmic logicaldisk get size,freespace,caption and press Enter.
- Review the available space on each drive.
- Press Windows key, type Disk Cleanup and open the app.
- Select the drive you want to free up space on and click OK.
- Select the type of data you want to remove and click OK to confirm.
- Repeat the process for other drives you want to free up space on multiple.
- Check if the ERROR_PAGE_FAULT_COPY_ON_WRITE issue persits.
Alternatively, you can use a third-party PC cleanup tool. They’re more user friendly and can occasionally detect more junk than the built-in Disk Cleanup.
2. Fix file corruption
- Open Command Prompt as an administrator.
- Type: chkdsk /f C: (Replace C: with the drive letter you want to check).
- Press Enter and let the tool scan and fix any issues.
- You may need to restart your computer for it to complete.
3. Check permissions
- Right-click the file or folder causing the issue and select Properties.
- Go to the Security tab and select Advanced..
- Ensure that your user account has Full Control.
- If not, click Edit to grant yourself access.
- Try opening the app again and se if you’re still getting the fault copy on write error.
4. Run the System File Checker
- Open Command Prompt as an administrator.
- Type: sfc /scannow and press Enter.
- Wait for the scan to finish. If any issues are found, SFC will attempt to fix them automatically.
- Restart your PC and check if you’re still getting a ERROR_PAGE_FAULT_COPY_ON_WRITE message.
5. Check drivers
- Open Device Manager.
- Expand all sections and look for a warning sign next to device names ⚠️.
- Right-click on the device(s) displaying the erorr and select Update driver.
- Select Search automatically for drivers and follow the on-screen prompts.
6. Perform a clean boot
- Press Win + R to open the Run dialog box.
- Type msconfig and press Enter.
- In the System Configuration window, go to the Services tab.
- Check the box at the bottom labeled Hide all Microsoft services.
- This will ensure that only non-Microsoft services are listed.
- Click Disable all to disable all third-party service.
- Next, go to the Startup tab and click on Open Task Manager.
- In the Task Manager window, disable all the startup programs by right-clicking each one and selecting Disable.
- Close Task Manager and return to the System Configuration window.
- Click OK and then restart your computer.
Fixing copy-on-write errors like ERROR_PAGE_FAULT_COPY_ON_WRITE is not as difficult as it may seem at first. You just have to address underlying issues like memory problems and file corruption.
Similar steps can also fix errors like ERROR_DLL_MIGHT_BE_INSECURE or RESOURCE_REQUIREMENTS_CHANGED.
Let us know if you need more help with this error and give us more details in the comments below.
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