ERROR_APP_DATA_REBOOT_REQUIRED - 4404 (0x1134)
Fast Cache has been ReArmed and requires a reboot until it can be updated.
Updated: Feb 21, 2026
Technical Background
The error code ERROR_APP_DATA_REBOOT_REQUIRED with the numeric value 4404 and hexadecimal representation 0x1134 is associated with a specific condition in the Windows operating system. This error indicates that the Fast Cache, which has been ReArmed, requires a reboot to be updated.
Error Details
The Fast Cache mechanism in Windows is designed to improve application performance by caching frequently accessed data. When this cache is ReArmed, it means that changes or updates have been made to the cache configuration, and these changes cannot take effect until the system is restarted. This error code is returned when an attempt is made to use the updated Fast Cache without a reboot.
Common Causes
- Rearming of Fast Cache: The Fast Cache has undergone modifications or reconfiguration that necessitate a reboot for the changes to be applied.
- Application Usage Context: An application may have attempted to access cached data before the system is properly reconfigured post-reboot, leading to this error.
Real-World Context
This error typically occurs in scenarios where an administrator has made changes to the Fast Cache settings or when a system update includes modifications to the cache configuration. Developers should be aware that attempting to use the updated cache without a reboot will result in this error being returned.
Is This Error Critical?
The severity of this error is not critical for system stability but can impact application performance and functionality until the system is properly reconfigured post-reboot. It is recommended to follow best practices by ensuring all necessary reboots are performed after making changes to cache configurations or performing system updates that affect Fast Cache.
How to Diagnose
To diagnose this error, developers should:
- Review Operation Context: Ensure the application context and environment are correctly set up before attempting to use cached data.
- Validate Parameters: Verify that all parameters related to cache usage are correct and valid.
- Confirm Object Types: Confirm that the object types being accessed align with the expected behavior of the Fast Cache mechanism.
How to Resolve
To resolve this error, developers should:
- Correct Parameter Usage: Ensure all parameters used in cache-related operations are correctly set.
- Adjust Operation Context: Perform any necessary reboots or system restarts before attempting to use updated cache configurations.
- Restore Data: If data corruption is suspected, restore the cache from a known good state if possible.
Developer Notes
Developers should be aware that this error code does not indicate a failure in the Fast Cache mechanism itself but rather a requirement for system reconfiguration. It is important to follow best practices and ensure all necessary reboots are performed after making changes to cache configurations or performing system updates that affect Fast Cache.
Related Errors
- ERROR_APP_DATA_CORRUPTED: This error may be related if the cached data itself is corrupted, leading to issues with application performance.
- ERROR_APP_DATA_INACCESSIBLE: This error might occur if there are access issues preventing the application from using the cache correctly.
FAQ
Q: What does ERROR_APP_DATA_REBOOT_REQUIRED mean?
A: It indicates that Fast Cache has been ReArmed and requires a reboot to be updated before it can be used effectively.
Q: How do I resolve this error?
A: Perform the necessary reboots after making changes to cache configurations or performing system updates that affect Fast Cache.
Q: Is this error critical for system stability?
A: No, but it can impact application performance and functionality until the system is properly reconfigured post-reboot.
Summary
The ERROR_APP_DATA_REBOOT_REQUIRED error code with the numeric value 4404 (0x1134) indicates that Fast Cache has been ReArmed and requires a reboot to be updated. This error does not indicate a failure in the cache mechanism itself but rather a requirement for system reconfiguration. Developers should ensure all necessary reboots are performed after making changes to cache configurations or performing system updates that affect Fast Cache.