When manually installing Windows Updates, are you facing error 0x800B0003 in Windows 11/10? Does the error appear before being able to finish downloading? Does this error also point to the Memory Management issue? This post will discuss the causes and solutions to this error.

Fix 0x800B0003 error in Windows 11/10

In this part, we will discuss how to fix the 0x800b0003 error in Windows 11/10. We have given six working fixes that efficiently resolved this error.

1. Disable memory integrity in Windows Security
2. Run Windows update troubleshooter
3. Uninstall the recent Windows update
4. Run DISM
5. Run SFC
6. System Restore

We suggest you boot your PC into safe mode before performing some troubleshooting suggestions for the 0x800b0003 error. Let’s discuss all these fixes in detail.

1] Disable memory integrity in Windows Security

If the 0x800b0003 error points towards memory integrity, you can temporarily disable memory integrity in Windows security. To perform this process, follow the below guide.

• Left-click on the Windows main menu, search for Windows Security, and press Enter.
• Now find the Device security option under the security at a glance page and click on it.
•  Click on the core isolation details from the Device security page under the core isolation section.
• It will open the core isolation page; you will get the memory integrity option and the on and off toggle buttons. Make it off if which will disable the memory integrity in Windows security, and check whether your issue is resolved or still there.

Suppose the issue is there after disabling the memory integrity. In that case, we suggest you download a reliable memory tester like Memtest86 to check whether there is any issue in memory units. If there is any, then you must replace it.

2] Run Windows Update Troubleshooter

Sometimes, the 0x800b0003 error occurs due to a Windows update error. In such cases, you can quickly fix it by running the windows update troubleshooter. Follow the below guide to perform it.

• Press the Windows + I keys simultaneously to open the Settings page.
• Now from the left side panel, choose the system. Directly from the right-side panel of the System page, please scroll down and search for Troubleshoot option and click on it.
•  It will open a new page; you must click the other-troubleshooters option.
• Now under the Most frequent section, go to the Windows update and click on the Run option near it.

Wait for some time. If there is any issue, it will show and fix it. After completing this process, check whether your issue is resolved or not.

Related: Windows Update Troubleshooter not working.

3] Uninstall the recent Windows Update

Sometimes a partial Windows update can cause the 0x800b0003 error. In such a condition, we suggest you remove any installed update based on the date the error occurred.

Once done, delete the files under C:\Windows\SoftwareDistribution and restart the update process. After completing the update process, check whether the issue is fixed.

4] Run DISM

DISM scan finds crucial core files required to run and gather information, then upgrades or repairs any outdated or corrupted files. To resolve the 0x800b0003 error, you can run the DISM command on the command prompt.

In the case of BSOD(Blue Screen Of Death), even in safe mode, we recommend you run the Dism /Online /Cleanup-Image /RestoreHealth command in the Windows Terminal. After completing the process, check whether the issue is resolved or not.

5] Run SFC

If DISM doesn’t show any error, we suggest you run the SFC/Scannow command on the command prompt window. Usually, an SFC scan locates corrupted system files and repairs them. So if there is any corrupted file, the SFC scan will find and fix it, and you will not see the 0x800b0003 error again.

6] System Restore

If none of the above fixes works for you, we recommend you perform a system restore to the point where your PC works fine. Then check whether the 0x800b0003 error is still showing or not.

Conclusion

I hope the post was easy to follow and you were able to resolve the 0x800b0003 error in Windows. Most of the time, it’s corrupt Windows update files, which can be quickly resolved unless the memory integrity setting is causing it to fail.

Here we have given some frequently asked questions to help you clear your doubts. So read this section carefully.

Can a Windows installation be corrupted?

Yes, Windows installation can be corrupted. Usually, it happens due to several reasons like issues in the save process, viruses, malware, system crash, sudden power outage, and much more. The most successful way is to use Advanced recovery and tools such as SFC, DISM, or System Restore to fix the problem.

Can I repair Windows with ISO file?

While Windows ISO file does not have the feature to repair Windows, it can help you create a recovery disk. You can create a bootable USB drive using tools that work on Mac or Windows. Post that, you can boot the PC in the problem using the USB drive, go into advanced recovery, and then attempt to repair the Windows installation.