If you have DisplayLink driver installed, check the version - The latest version fixes issues with video output from HDMI. Updating to the latest version of the DisplayLink driver fixed my issues.
KB5071546 (08.12.2025) breaking video system?
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Victor
0
Reputation points
There is an Acer Aspire E 15 laptop. Video adapters: Intel HD Graphics 520 (driver 20.19.15.4390), NVIDIA GeForce 940MX (driver 32.0.15.8180 (581.80)). Windows 10 Enterprise LTSC 21H2, build 19044.6691. All system updates have been delivered and installed.
Everything worked fine up to a certain point. Around December 20, the following started happening:
When connecting a second monitor via HDMI, the monitor initially works in duplicate (mirror) mode, and in this mode everything functions correctly. However, when pressing Win+P and selecting “Extend,” the entire Windows interface disappears: only the active window remains visible, the second monitor shows a black screen, and only Ctrl+Alt+Del works. After rebooting with the HDMI cable connected, the same thing occurs—the shell loads and then both screens turn black.
I tested this on another laptop (ASUS X550V, Windows 10 Enterprise 22H2, regularly updated system), and the same behavior occurs.
On the first laptop, I was able to roll back to the restore point KB5071546, and everything returned to normal. On the second laptop, due to a small SSD, rollback was not possible.
UPD: another one with this issue (Acer Nitro V15), system restore was helpful.
Windows for business | Windows for IoT
2 answers
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Harry Phan 20,455 Reputation points Independent Advisor2026-01-14T08:08:25.2066667+00:00 Hi Victor
This behavior is tied to a recent cumulative update that introduced a regression in multi‑monitor handling with certain Intel/NVIDIA hybrid graphics drivers. The fact that rolling back KB5071546 restores normal functionality confirms the update is the trigger rather than hardware failure. When “Extend” is selected, the shell process (explorer.exe) fails to render across adapters, leaving only the active window visible and forcing a Ctrl+Alt+Del escape.
The best practice fix is to update both GPU drivers to the latest vendor‑supported versions. For Intel HD Graphics 520, install the latest DCH driver package from Intel (not the OEM‑bundled legacy 20.19.15.4390). For NVIDIA GeForce 940MX, use the current Game Ready or Studio driver from NVIDIA rather than the 581.80 branch. After updating, reapply the cumulative update and test again. If the issue persists, you can temporarily block KB5071546 using the “Show or Hide Updates” troubleshooter or WSUS until Microsoft releases a corrected build.
On systems where rollback is not possible, the only stable workaround is to uninstall the problematic update via
wusa /uninstall /kb:5071546from an elevated command prompt, then pause updates. If the SSD space is too small for restore points, consider enabling external backup before applying cumulative updates. Microsoft is aware of display regression issues in recent builds, so monitoring the release notes for LTSC patches is important.I hope you've found something useful here. If it helps you get more insight into the issue, it's appreciated to accept the answer. Should you have more questions, feel free to leave a message. Have a nice day!
Harry.