The Vivobook S 15 is built around its NPU. That small AI accelerator powers Recall, Studio Effects, Live Captions, and the Copilot+ experiences that make the laptop feel like more than an ordinary Windows machine. When Device Manager shows an NPU driver error — a yellow warning, an error code, or a device that simply will not start — every one of those features goes dark at once, and the laptop feels like it has lost its defining feature.

The good news is that an NPU driver error is a software problem in nearly every case. The NPU hardware rarely fails; what fails is the driver stack around it. Windows Update can install a mismatched driver, an interrupted update can corrupt the installation, or a chipset driver can drift out of sync with the NPU driver. Each of those has a clean fix, and the order matters: the chipset and platform drivers must be right before the NPU driver can load.

This guide walks you through that order: reading the error, cleaning the driver, installing the correct Asus stack, and verifying the NPU is working again.

Why this happens

  • Windows Update installed a mismatched NPU driver: A generic or newer driver that does not match the Vivobook’s firmware can fail to start with an error code.
  • Interrupted driver installation: A driver update cut short by a restart, sleep, or power loss can leave the NPU driver half-installed.
  • Chipset driver out of sync: The NPU depends on the platform and chipset drivers, and a version mismatch can block the NPU from starting.
  • BIOS firmware too old: An outdated BIOS may not expose the NPU correctly to a newer Windows driver.
  • Corrupt driver store entry: A damaged driver package in the Windows driver store can keep reinstalling the same broken driver.
  • Conflicting driver from another source: A Qualcomm generic driver installed over the Asus driver can conflict with the laptop’s firmware configuration.

How to fix it

Work through these in order — diagnose first, then act.

Fix 1: Read the exact error code

The error code tells you whether the problem is a missing driver, a conflict, or a failed start.

  1. Open Device Manager, expand Neural processors or System devices, and find the NPU entry with the yellow warning.
  2. Right-click it, choose Properties, and note the error code and message on the General tab, such as Code 10, Code 31, or Code 43.
  3. Check the Driver tab for the driver version and date, which tells you whether Windows recently changed it.
  4. Search the Asus support forum for your error code plus “Vivobook S 15 NPU” to see whether it is a known issue.
  5. Keep the code noted, since it guides which of the following fixes is most likely to work.

Fix 2: Roll back or cleanly reinstall the NPU driver

A clean reinstall fixes most NPU errors, because it removes the corrupted or mismatched driver.

  1. In Device Manager, right-click the NPU device and choose Uninstall device, ticking “Attempt to remove the driver for this device” if available.
  2. Restart the laptop and let Windows attempt to reinstall the NPU driver automatically.
  3. Check Device Manager again: if the error is gone, test an AI feature such as Studio Effects to confirm the NPU works.
  4. If the error returns, roll back the driver instead: open the device Properties, Driver tab, and click Roll Back Driver if available.
  5. If neither works, move to the full Asus driver stack fix below rather than repeating the same reinstall.

A similar clean-reinstall fix resolves Copilot Voice wake word failures when a service driver stalls, and the same stack-order logic applies when Visual Studio Copilot completion fails because an AI component is out of sync. For a related driver check, see ChatGPT app problems on ARM .

Fix 3: Install the full Asus driver stack in order

The NPU driver cannot work alone — the chipset and platform drivers must match it.

  1. Visit the official Asus support site for the Vivobook S 15 and download the latest chipset, platform, and NPU drivers for your exact model.
  2. Install the chipset driver first, restart, then install the platform driver, restart again.
  3. Install the NPU driver last, and restart once more.
  4. Check Device Manager after each restart to confirm no new warnings appeared.
  5. Test Recall, Studio Effects, and Live Captions to confirm the NPU is actually accelerating AI features.

Fix 4: Update the BIOS

An outdated BIOS can fail to expose the NPU to newer Windows drivers.

  1. Open MyASUS and check for a BIOS update for the Vivobook S 15, noting whether the release notes mention NPU, AI, or Copilot fixes.
  2. Install the BIOS update only with the charger connected, and never interrupt it.
  3. After the update, boot into Windows and check Device Manager for the NPU status.
  4. If the NPU driver still errors, reinstall the NPU driver once more after the BIOS update, since the new firmware may need a fresh driver bind.
  5. Test AI features again before moving on.

Fix 5: Check Windows Update and optional driver updates

Windows may be offering the correct driver as an optional update that you have not installed.

  1. Open Settings, go to Windows Update, then Advanced options, then Optional updates.
  2. Look for driver updates related to Qualcomm, the NPU, or the system, and install them.
  3. Restart and check Device Manager for the NPU status.
  4. If Windows Update keeps reinstalling a broken driver, use the “Show or hide updates” approach: install the Asus driver, then pause driver updates in Windows Update settings temporarily.
  5. Verify the NPU in Task Manager’s Performance tab, where a working NPU appears as a device with activity.

Fix 6: Reset the driver store and check for hardware faults

When every reinstall fails identically, the driver store or the hardware may be at fault.

  1. Open Command Prompt as administrator and run the System File Checker to rule out system corruption affecting driver installation.
  2. If you are comfortable with advanced tools, use Device Manager to remove all ghost NPU entries under View, then Show hidden devices.
  3. Check Microsoft’s official driver troubleshooting guidance at Microsoft Support for further steps.
  4. If the NPU shows the same error across a clean Windows install, the hardware itself may be faulty.
  5. Book an authorized Asus service inspection in that case, since NPU replacement is a board-level repair.

Closing

An NPU driver error on the Vivobook S 15 looks alarming, but it is almost always a driver stack problem, not a dead AI chip. Read the error, reinstall cleanly, install the Asus stack in the right order, and update the BIOS, and the NPU usually comes back to life with all its Copilot+ features. If the error survives a clean driver stack and a BIOS update, a service check is the right final step — but for most Vivobook owners, the fix ends well before that point.

Frequently asked questions

What does an NPU driver error mean on the Vivobook S 15?
It means Windows cannot load or communicate with the neural processing unit, so AI features like Recall, Studio Effects, and Copilot acceleration stop working even though the rest of the laptop is fine.
Why did the NPU driver suddenly start showing an error?
Windows updates, interrupted driver installs, and chipset driver mismatches are the usual triggers. The NPU driver is sensitive to the exact driver stack around it.
Can I use the laptop normally with an NPU error?
Yes, for ordinary tasks. You lose AI acceleration and Copilot+ features, but browsing, documents, and video still work while you fix the driver.
Should I download NPU drivers from Qualcomm or Asus?
Use Asus first. Asus validates the NPU driver against the Vivobook S 15’s firmware, while a generic Qualcomm driver may mismatch the laptop’s configuration.