How to Fix Error 0xc00004ac “The Application Was Unable to Start Correctly” in Windows 11
If you’re seeing error code 0xc00004ac with the message “The application was unable to start correctly”, you’re likely dealing with a conflict caused by Memory Integrity—a Windows security feature. This guide will walk you through disabling it safely and explain the deeper cause behind the issue.
What Causes Error 0xc00004ac?
This error typically appears due to a low-level programming conflict involving process hollowing, a technique often used in malware, but sometimes triggered by legitimate applications. The code 0xc00004ac refers to STATUS_CONFLICTING_ADDRESSES, meaning two processes are trying to access the same memory space.
Windows 11’s Memory Integrity feature blocks such behavior as a security precaution—but in some cases, it interferes with legitimate apps.
Quick Fix: Disable Memory Integrity
Note: Disabling this feature reduces your system’s security. Do this only if necessary, and enable it again once the issue is resolved by Microsoft.
Steps to Disable Memory Integrity:
- Click Start → Select Settings.
- Go to Privacy & security → Windows Security.
- Click Device Security.
- Under Core isolation, click Core isolation details.
- Toggle Memory Integrity to Off.
- If prompted by User Account Control, click Yes.
- Restart your PC.
After restarting, try launching the application again. The error should no longer appear.
When Will This Be Permanently Fixed?
This is a programming-level issue—until Microsoft or the software developer issues a patch that avoids memory conflicts caused by process hollowing, this workaround is your best option. Microsoft is aware of this behavior, so a permanent fix may arrive in a future update.
Summary
| Problem | Cause | Temporary Fix | Permanent Fix |
| 0xc00004ac – The application was unable to start correctly | Memory Integrity blocking apps due to address conflicts | Turn off Memory Integrity | Wait for a Windows or app update |
FAQs
Is disabling Memory Integrity safe?
It reduces your PC’s protection against advanced attacks. Use it only as a temporary solution.
What is Process Hollowing?
A technique where a process replaces the memory of a legitimate application. Often flagged by Memory Integrity as suspicious.
Should I turn Memory Integrity back on?
Yes, once the issue is resolved or the app is updated.
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