The Samsung Galaxy Book5 Pro is one of Samsung’s flagship Copilot+ PCs, built around Intel’s Core Ultra platform with a dedicated NPU for on-device AI. That neural processor powers Windows Studio Effects, live captions with translation, and — on qualifying configurations — Windows Recall. When the NPU misbehaves, those features break silently: background blur greys out in Teams, Recall refuses to enable, or the NPU simply vanishes from Device Manager.

Most Book5 Pro NPU problems trace back to a small set of causes. Samsung delivers drivers through its own Samsung Update channel, which sometimes lags behind or conflicts with Windows Update. The Intel AI Boost driver — the actual software interface to the NPU — can fail to install, corrupt during an update, or get replaced by a mismatched version. And Recall has strict prerequisites that fail in ways Windows barely explains.

This guide walks you through six fixes in technician order: verify the hardware state first, repair the driver stack, then check firmware and feature prerequisites. Recheck your AI features after each fix so you know exactly which step solved it.

Why this happens

  • Samsung Update and Windows Update conflict: Samsung’s driver channel and Windows Update can push competing versions of the chipset and AI Boost drivers, leaving a half-installed NPU driver that fails to start.
  • Intel AI Boost driver missing or corrupt: The NPU needs this specific driver to appear and function. An interrupted install — forced shutdown, battery dying mid-update — leaves it broken or absent.
  • Outdated BIOS firmware: The BIOS tells Windows the NPU exists at boot. Old firmware on the Book5 Pro can misreport or fail to enumerate the neural processor entirely.
  • Recall prerequisites not met: Recall demands 40+ TOPS of NPU performance, BitLocker device encryption, Secure Boot, a Microsoft account, and Windows Hello enrollment. Missing any one blocks it without a clear error.
  • Samsung power optimization interference: Samsung’s battery and performance profiles can park the NPU aggressively, causing Studio Effects to drop out or the NPU to stop responding after sleep.
  • Stuck firmware after sleep or hibernate: The NPU sometimes fails to resume from modern standby, showing as failed in Device Manager until the machine fully powers down.

How to fix it

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

Fix 1: Verify the NPU’s actual state in Device Manager

Before changing anything, find out whether Windows sees the NPU at all. The failure mode determines the fix: a missing NPU is a driver or firmware problem, while a flagged one is a driver-start problem.

  1. Press Win + X, open Device Manager, and expand Neural processors — the Intel AI Boost entry should sit there on a healthy machine.
  2. If the category is missing, check System devices and Other devices for an unknown device with a yellow warning.
  3. Open dxdiag and look at the System tab. If the NPU is not showing in dxdiag either, the driver is almost certainly missing rather than merely misconfigured.
  4. Note exactly what you see — missing, flagged, or unknown device — before moving on.

Fix 2: Repair the driver stack through Samsung Update first

Samsung validates its drivers against the Book5 Pro’s specific power and thermal firmware, so its channel should be your first source — generic drivers come second. A clean reinstall through Samsung Update fixes most driver-start failures.

  1. Open Samsung Update from the Start menu and install every pending driver, especially chipset, AI Boost, and BIOS items.
  2. In Device Manager, right-click the NPU or unknown device, choose Uninstall device, and check “Attempt to remove the driver for this device” to purge corrupt files.
  3. Restart, reopen Samsung Update, and reinstall the chipset/AI Boost package it offers.
  4. Confirm the Intel AI Boost entry appears cleanly under Neural processors.
  5. If Samsung Update offers nothing, run the Intel Driver & Support Assistant as the fallback source and install the detected chipset driver.

Fix 3: Update the Book5 Pro BIOS and firmware

The BIOS enumerates the NPU for Windows during every boot. Samsung ships BIOS fixes that correct NPU enumeration, and an old BIOS is a classic reason the neural processor disappears after a Windows feature update.

  1. In Samsung Update, check for a BIOS/firmware entry newer than your current version (compare with BIOS Version/Date in msinfo32).
  2. Close all programs, connect the charger, and run the BIOS updater — the screen may go black for several minutes, which is normal.
  3. Do not touch the power button during the flash; an interrupted BIOS update can brick the machine.
  4. After Windows loads, verify the NPU in Device Manager and test Studio Effects. For deeper driver-level steps, the Book5 NPU driver repair guide covers manual installation paths.

Fix 4: Meet every Recall prerequisite

Recall fails quietly when even one requirement is missing, and Windows rarely tells you which. Walk the checklist deliberately instead of guessing.

  1. Confirm BitLocker is on: Settings > Privacy & security > Device encryption must show encryption enabled.
  2. Check Secure Boot: run msinfo32 and confirm Secure Boot State reads On.
  3. Sign in with a Microsoft account (not a local account) and enroll in Windows Hello under Settings > Accounts > Sign-in options.
  4. If Recall says it is blocked by policy, work through the Recall disabled by organization steps — this is common on machines that were ever joined to a work or school account.
  5. Open Settings > Privacy & security > Recall & snapshots and toggle saving snapshots on.

Fix 5: Stop Samsung power profiles from parking the NPU

Samsung’s aggressive battery optimization can cut power to the NPU, which shows up as Studio Effects failing mid-call or the NPU erroring after the laptop sleeps. This is worth checking when the NPU works after a reboot but fails later.

  1. Set the power mode to Best performance or Balanced (not Best power efficiency) while testing.
  2. Open Control Panel > Power Options > Change advanced power settings and set PCI Express > Link State Power Management to Off.
  3. In Samsung Settings (if installed), look for battery optimization options that throttle background hardware and relax them.
  4. Test a Teams call with background blur for at least ten minutes to confirm the NPU stays alive.

Fix 6: Clear stuck NPU firmware with a full cold boot

When the NPU fails after sleep or hibernate, its firmware can be stuck in a state no driver reinstall will clear. A true cold boot forces the firmware to reinitialize the chip from scratch.

  1. Hold Shift and click Shut down to bypass hybrid shutdown.
  2. Unplug the charger and USB devices, then hold the power button for 15 seconds to drain residual power.
  3. Wait 30 seconds, reconnect the charger, and power on.
  4. Check Device Manager — a previously flagged NPU often starts cleanly now. If Studio Effects still misbehave, review Microsoft’s Windows support hub for the latest known issues with AI features.

Closing

Galaxy Book5 Pro NPU problems almost always come down to the driver channel: Samsung Update first, Intel’s assistant second, BIOS kept current, and Recall’s prerequisites genuinely met rather than assumed. Work the list in order and test after each step — most machines are fixed by Fix 2 or Fix 3. If the NPU still will not start after a clean driver install and a BIOS update, document what you tried and use Samsung’s warranty support; a persistent failure at that point points at hardware.

Frequently asked questions

Why is the NPU missing from Device Manager on my Galaxy Book5 Pro?
The NPU usually hides when the Intel AI Boost driver is missing or failed to load. Check under Neural processors or System devices after installing the chipset driver from Samsung Update. A BIOS update also helps if the firmware is not enumerating the chip.
Does the Galaxy Book5 Pro support Windows Recall?
Only Copilot+ configurations of the Book5 Pro qualify — they need 40+ TOPS of NPU power plus BitLocker, Secure Boot, a Microsoft account sign-in, and Windows Hello. Non-Copilot+ SKUs with weaker NPUs cannot run Recall at all.
Can I use Intel Driver & Support Assistant on a Samsung laptop?
Yes, as a second option — but try Samsung Update first. Samsung validates its own driver packages against the Book5 Pro’s power firmware, and generic Intel drivers occasionally break Samsung-specific features like battery optimization.
Will reinstalling drivers delete my files?
No. Removing and reinstalling NPU and chipset drivers only resets driver-level state. Your files, apps, and Windows settings are untouched — though you should still keep regular backups as good practice.