After applying the Windows 10 August update, if you’re having
problems with your laptop, especially Lenovo ThinkPad, you’re
not the only one.
A bug in Windows 10 KB4566782 and Lenovo’s BIOS is causing
ThinkPad laptops to get stuck in Blue Screen of Death (BSOD).
Lenovo has released a statement offering a workaround that
seems to fix the issue for users, but non-Lenovo owners are
also running into problems after August patch.
In a statement, a Lenovo representative noted that the problem
has something to do with the BIOS setting “Enhanced
Windows Biometric Security” which is in the Security ->
Virtualization menu of BIOS Setup.
According to Lenovo, Windows has not yet implemented the
software for this BIOS setting, so it doesn’t serve any purpose
and it can be safely disabled.
Lenovo Canada has also published a support document
that claims Windows 10’s KB4566782 (August 2020 update) could
trouble ThinkPad owners with the following issues:
- BSOD when starting your device.
- BSOD when starting the Lenovo Vantage app.
- BSOD when running Windows Defender Scan.
- Issues with Windows Hello, Intel Management Engine, and IT
After installing Windows 10 KB4566782, Lenovo owners were
greeted to a Blue Screen of Death error that read:
SYSTEM_THREAD_EXCEPTION_NOT_HANDLED – ldiagio.sys.
This error usually occurs when Vantage app is trying to use the
Intel Management Engine to interface with the firmware, but the
process is prevented by this BIOS setting and Windows 10’s
To fix “SYSTEM_THREAD_EXCEPTION_NOT_HANDLED – ldiagio.sys”
error, follow these steps:
- Boot into the BIOS settings.
- Navigate to Security.
- Click on ‘Virtualization’.
- Turn off “Enhanced Windows Biometric Security” in Security
-> Virtualization menu.
- Boot to desktop.
The above workaround will resolve the problem with ThinkPad
Non-Lenovo-owners are also affected
If you don’t use a ThinkPad laptop, but you’re still getting
Blue Screen of Death errors, you’re the only one. The Blue
Screen of Death bug has also surfaced on non-ThinkPad-machines,
according to reports in our comments section, Reddit, and
Microsoft’s forums/Feedback Hub.
Unfortunately, when the Blue Screen of Death appears, there is
nothing that can be done.
Some users have also experienced a complete crash of system and
slow performance during the boot.
“I went from a perfectly fine, basically brand new computer, to
more busted than the old PC I replaced, basically overnight,”
one Reddit user noted.
Again, we don’t know how widespread the problem is, but we at
least have a confirmation from Lenovo that something is wrong
with the Windows 10’s August update. There are various reports
on social media and forums describing the issue, but users have
failed to find a proper workaround.
For some users,
turning off virtualization feature resolves the Blue Screens
error, while others report uninstalling the August update
is the best way to go.