How To Fix Application Popup Error Event ID 56 ACPI 5 on Windows 11 / 10

Troubleshooting Application Pop-up Error ID 56 ACPI 5 on Windows 10 and Windows 11

Honestly, dealing with the Application Pop-up Error ID 56 ACPI 5 can be a pain. It shows up unexpectedly, often during gaming, streaming, or just regular work sessions on Windows 10 or 11. This error usually points to issues with ACPI — that’s the Advanced Configuration and Power Interface which handles power management and hardware communication. When something isn’t playing nice here, your PC might start throwing these error messages, and at first, it’s not always clear what caused them. Sometimes, I’ve seen these errors just appear out of nowhere after a Windows update or driver tweak, which is super frustrating.

First Things First: Check Recent Windows Updates

One common culprit is a recent Windows update. Updates are meant to boost security and stability, but occasionally they backfire and cause more problems. To test this, I went into Settings (quick way: Windows + I) and headed over to Windows Update. Then, I clicked on Update history, scrolled down to Uninstall updates — that’s where you can see what recently installed. I looked for updates just before the error started showing up. If you find something suspicious, right-click it and select Uninstall. After that, reboot and see if the error still appears. If it does, no worries—there are other options to try.

Pro tip: sometimes these updates get stuck or cause conflicts, so it’s worth considering rolling back if the problem began right after an update. If you’re cautious, creating a restore point beforehand is never a bad idea.

Update or Roll Back Drivers — Especially Graphics

Drivers, especially for your graphics card, can be real troublemakers here. Seeing errors after system updates or configuration changes is pretty common. I opened Device Manager (Win + X then select it), then expanded Display Adapters. Right-clicked on my GPU, chose Update driver, and went for Search automatically for updated driver software. If that didn’t help, I checked the GPU manufacturer’s site (like [NVIDIA](https://www.nvidia.com/Download/index.aspx), [AMD](https://www.amd.com/en/support), or Intel’s driver page) to download the latest driver manually. Sometimes, newer isn’t better — if the latest gives you trouble, rolling back to a previous driver version can help, so try that if needed.

After updating or rolling back, a quick restart is good to see if the error persists. In my experience, graphics drivers being out-of-sync or buggy are often behind these ACPI alerts.

Run System File and DISM Checks

If the root cause isn’t a driver or update, system file corruption might be the issue. To investigate, I ran some built-in tools — but fair warning, it can take some time. I opened Command Prompt with administrator rights (search for “cmd,” right-click, then choose Run as administrator), and executed these commands:

DISM /Online /Cleanup-Image /ScanHealth
DISM /Online /Cleanup-Image /CheckHealth
DISM /Online /Cleanup-Image /RestoreHealth

This checks and attempts to repair your Windows image. Then I ran sfc /scannow to scan and fix system files. It’s slow, but worth it. Reboot after each round. Sometimes, just running these fixes gets rid of tricky errors like this, especially if your system is showing signs of corruption or missing files.

Disable Unused Audio Devices

Oddly enough, extra audio devices that you’re not using can cause conflicts. If you have multiple microphones or speakers listed under Device Manager (Win + XDevice Manager), try right-clicking unused ones (or secondary ones you don’t need all the time) and choosing Disable device. Just make sure you don’t disable your main mic or speakers unless you’re ready to troubleshoot sound issues. Reboot and see if this clears up the error.

Streamline System Startup and Background Apps

Many conflicts can stem from unnecessary apps starting up with Windows or background processes running in the background. I went into msconfig (Win + R, type msconfig, press Enter), clicked the Services tab, checked Hide all Microsoft services so I wouldn’t disable essential Windows stuff, then disabled everything else temporarily. Then, I went to the Startup tab and hit Open Task Manager. Disabled a few non-essential startup programs to reduce anything unnecessarily running in the background. After rebooting, I checked if the error still popped up. Sometimes, a single background process conflicts with ACPI — so this step can surprisingly help.

System Restore: Going Back in Time

If nothing else works, restoring Windows to a previous point where everything was fine is a reliable fallback. I did this through Control PanelRecoveryOpen System Restore. Pick a restore point from before the error started. The process takes some time, and yes, it involves several reboots. Make sure you’ve backed up important data first because sometimes, restoring will undo recent driver or software changes. But yeah, it’s often the cleanest way to recover system stability when stuff’sDeep-fried.


This error can be really stubborn, and honestly, I spent way too many late nights troubleshooting. The key is to go methodically—check updates, drivers, system health, and background processes. It’s frustrating, but persistent troubleshooting eventually pays off. Hope this helps someone else avoid the endless googling I did. It took me way too long to figure out!

Remember to Follow Up!

Once you think you fixed it, double-check:

  • System boots normally without error pop-ups.
  • Device Manager shows no warning icons.
  • Windows doesn’t complain about ACPI or TPM issues anymore.

If problems keep coming back, revisit driver updates or consider a clean reinstall of Windows — sometimes, that’s the last resort.

Anyway, hope this saves someone else a weekend. Good luck!