Editing Openai/696fd677-90ec-800b-a423-9848e9b171f0 (section)

=== Assistant: Perfect — that model detail lets us be very specific now. ===
Perfect — that model detail lets us be very specific now.

You’re on a Lenovo IdeaPad Slim 5i, Intel i5 13th-gen H-series, Windows 11. This combination has a known sensitivity to ACPI + firmware + chipset alignment, especially after Windows 11 updates.

At this point, your issue is almost certainly not Windows, and almost certainly not random hardware failure.

==== What is actually going wrong (plain diagnosis) ====

Your crashes are being caused by Lenovo ACPI / power-management drivers not matching the BIOS and Intel chipset stack.

AcpiVpc.sys is part of Lenovo’s ACPI Virtual Power Controller. On 12th/13th-gen Intel systems, this driver must match:
* BIOS version
* Lenovo System Interface Foundation
* Intel Chipset Device Software

When one of those is out of sync, you get exactly:
* DRIVER_VERIFIER_IOMANAGER_VIOLATION
* IRQL_NOT_LESS_OR_EQUAL
* UNEXPECTED_KERNEL_MODE_TRAP

SFC being clean confirms this is not OS corruption.

==== The correct fix (order matters — do not skip steps) ====

===== 1️⃣ Make sure Driver Verifier is OFF =====

From normal Windows (or Safe Mode if needed):

<syntaxhighlight>verifier /reset

</syntaxhighlight>

Reboot.

This prevents false crashes while fixing the root cause.

===== 2️⃣ Update BIOS first (critical) =====

Go to Lenovo Support → your exact Slim 5i model → BIOS.
* Install the latest BIOS/UEFI
* Plug in AC power
* Do not interrupt

This step alone fixes many ACPI crashes on this model.

===== 3️⃣ Install Lenovo System Interface Foundation (mandatory) =====

On Lenovo’s driver page, download and install:
* Lenovo System Interface Foundation

This package provides the correct ACPI hooks that AcpiVpc.sys depends on.

Reboot.

===== 4️⃣ Install Lenovo Power / VPC / Hotkey drivers =====

Install only from Lenovo, not Windows Update:
* Lenovo Power Management / VPC driver
* Lenovo Hotkey / Function Keys (if listed)

Reboot again.

===== 5️⃣ Reinstall Intel Chipset drivers =====

From Lenovo’s site (preferred), or Intel if Lenovo doesn’t list a newer one:
* Intel Chipset Device Software
* Intel Management Engine (ME)

Reboot.

==== What NOT to do ====
* ❌ Do not reinstall Windows
* ❌ Do not use generic ACPI drivers
* ❌ Do not mix Lenovo + random OEM utilities
* ❌ Do not re-enable Driver Verifier yet

==== If (and only if) crashes still happen after all of this ====

At that point, do one of the following:
* Run MemTest86 (2 full passes)
* Or enable Driver Verifier again to identify the last remaining bad driver

But in practice, on this exact Lenovo + 13th-gen Intel setup, BIOS + System Interface Foundation fixes it ~90% of the time.

==== Bottom line ====

Your system is not dying.
You’re fixing a known Lenovo ACPI/firmware mismatch.

If you want, tell me:
* BIOS version before/after update
* Whether crashes stop after Step 3

I can adjust the remaining steps precisely if needed.