DRIVER_OVERRAN_STACK_BUFFER — stop code 0x000000F7 — means a driver wrote past the end of its stack buffer and overwrote neighboring memory. Windows plants a “canary” value at the edge of the stack, and when it finds that value destroyed, it knows a driver overran its buffer — so it crashes the system on purpose rather than let potentially exploited code keep running.

On Acer laptops, especially budget Aspire and Nitro models, this stop code frequently traces back to Wi-Fi and Bluetooth drivers — the MediaTek and Qualcomm Atheros drivers Acer ships on many models have had overrun bugs in specific versions. The fix is a targeted driver cleanup, not a reinstall, and it usually takes under an hour once you know which driver is guilty — just follow along step by step.

Why this happens

  • A driver writes past its stack buffer. The fundamental bug — the driver copies more data than the buffer holds, smashing the stack.
  • Outdated Wi-Fi or Bluetooth drivers. The most common real-world trigger on Acer laptops, particularly older MediaTek and Atheros builds.
  • A driver update introduced the overrun. New versions occasionally ship with buffer-handling regressions.
  • Corrupted driver binaries. Damaged files on disk cause erratic driver behavior including overruns.
  • Conflicting drivers. Two drivers managing the same device (for example, after installing a utility that bundles its own Bluetooth stack) can corrupt each other’s buffers.
  • Overclocking or unstable RAM. Memory instability can corrupt stack contents in ways that trip the overrun detection.
  • Malware masquerading as a driver. Rare, but rootkits that inject into the driver stack can trigger this detection — worth a scan if nothing else explains it.

How to fix it

Work through these in order, from least to most invasive. The minidump names the driver, so let it guide you.

Fix 1: Identify the driver from the minidump

Start with evidence, not guesses.

  1. Press Win + R, type %SystemRoot%\Minidump, and press Enter.
  2. Open the newest dump in WinDbg Preview (free from the Microsoft Store).
  3. Run !analyze -v and read MODULE_NAME and IMAGE_NAME.
  4. Common Acer offenders: athw10x.sys / athwnx.sys (Qualcomm Atheros Wi-Fi), mtkwl6ex.sys (MediaTek Wi-Fi), BTHport.sys (Bluetooth).
  5. Write down the file name — every fix below starts from it.
  6. If you are new to dump analysis, our DRIVER_VERIFIER_DETECTED_VIOLATION guide walks through WinDbg step by step.

Fix 2: Update the offending driver from Acer’s support portal

Get the Acer-validated driver for your exact model — not a generic one.

  1. Find your exact model number on the sticker under the laptop.
  2. Open Acer’s official support portal, search your model, and open Drivers and Manuals.
  3. Download the driver matching the crashing .sys file — usually under Wireless LAN or Bluetooth.
  4. Install it and restart.
  5. If the newest version is the one crashing, install the previous version instead — Acer keeps older releases available.

Fix 3: Clean-reinstall the driver completely

A corrupted install can overrun even with the right version, so wipe it fully first.

  1. Open Device Manager and find the device.
  2. Right-click it and choose Uninstall device, checking Attempt to remove the driver for this device.
  3. Restart — Windows will install its basic inbox driver.
  4. Now install the Acer driver you downloaded in Fix 2 over the inbox driver.
  5. Restart again and test for a few days with the activities that used to crash.

Fix 4: Remove conflicting wireless and Bluetooth software

Duplicate driver stacks are a classic overrun source on Acer machines.

  1. Open Settings > Apps > Installed apps.
  2. Uninstall third-party Wi-Fi managers, Bluetooth stacks, and “connection optimizer” utilities — Windows handles these natively.
  3. In Device Manager > View > Show hidden devices, remove ghosted or duplicate network and Bluetooth adapters.
  4. Restart and let Windows settle on a single driver stack per device.
  5. Microsoft’s Windows support hub covers native wireless management if you need to replace a removed utility’s features.

Fix 5: Scan for malware

Because this stop code is also a security tripwire, rule out malicious drivers.

  1. Open Windows Security > Virus & threat protection > Scan options.
  2. Run a Full scan and let it complete.
  3. Then run Microsoft Defender Offline scan, which reboots into a clean environment for the scan.
  4. If anything is found and removed, re-run sfc /scannow afterward to repair any system damage.
  5. Only treat malware as the cause if scans actually find something — do not chase this theory without evidence.

Fix 6: Test memory and reset overclocks

Unstable RAM corrupts stack contents and trips the overrun detector.

  1. Press Win + R, type mdsched.exe, and press Enter.
  2. Choose Restart now and check for problems and let the full pass run.
  3. Check results in Event Viewer under MemoryDiagnostics-Results.
  4. Reset any CPU or RAM overclocking to stock settings in the BIOS.
  5. If memory errors appear, reseat the sticks and retest; replace any stick that still errors. Similar memory-first diagnostics apply to the MEMORY_MANAGEMENT stop code if you want a deeper reference.

Fix 7: Update the BIOS

Acer BIOS updates fix hardware-compatibility issues that can manifest as driver overruns.

  1. Check your current version with msinfo32 (BIOS Version/Date).
  2. Download the latest BIOS for your exact model from Acer’s support portal.
  3. Flash it with the charger plugged in and leave the machine untouched until it completes.
  4. Load optimized defaults afterward and reconfigure only what you need.

Closing

DRIVER_OVERRAN_STACK_BUFFER on an Acer laptop is a driver writing past its stack — most often the Wi-Fi or Bluetooth driver on budget models. Read the dump, get the right driver from Acer for your exact model, and clean out any duplicate wireless software. It sounds like a deep technical fault, but the fix is refreshingly ordinary driver hygiene that anyone can do.

Frequently asked questions

What does DRIVER_OVERRAN_STACK_BUFFER mean?
It is a blue screen stop code (0x000000F7) meaning a driver wrote more data to its stack buffer than the buffer could hold, overwriting adjacent memory. Windows detects the overrun with a stack cookie check and crashes to prevent exploitation.
Is this error a security problem?
It can be. Stack buffer overruns are a classic exploitation technique, which is why Windows crashes deliberately when it detects one. In practice on home laptops, it is almost always a buggy driver rather than an attack — but update the driver promptly either way.
Which drivers cause it on Acer laptops?
Wi-Fi drivers (particularly older Qualcomm Atheros and MediaTek builds shipped on budget Acer models), Bluetooth drivers, and USB drivers are the most common. The minidump names the exact file.
Can I fix it by updating just one driver?
Often yes — if the dump consistently names the same .sys file, updating or replacing that single driver resolves it. A broader driver cleanup is only needed when dumps are inconsistent.