This story is part of the Nerds News briefing for April 7, 2026. Watch the full episode on YouTube or read all six stories together in the main briefing.

Cross-Signed Kernel Drivers Deprecated: Check Your Old Hardware

This one is going to sneak up on a few businesses. The April Windows 11 update deprecates cross-signed kernel drivers — a category of older drivers that didn’t go through Microsoft’s modern driver-signing process. After the patch lands, those drivers will no longer be considered legitimate, and any hardware that depends on them will stop working.

For most clients running modern PCs and standard peripherals, this is a non-event. Where it bites is the long tail of specialty equipment: older scanners, point-of-sale terminals, label printers, scientific instruments, industrial control devices, and one-off custom hardware that hasn’t seen a driver update in years. If you run anything in your office that you’d describe as "old but it works," this is the time to check whether the manufacturer ever issued a modern signed driver.

If you’re an ACS managed client, we’re already auditing for this in our patch compatibility checks. If you’re not — and you have an oddball piece of hardware you can’t afford to lose — call us before April patches roll out and we’ll help you verify it.

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How ACS helps

Stuff like this is exactly why we built our managed services packages — so small business owners don’t have to track every Microsoft announcement or wonder which patch matters. If you’d like an IT partner that watches this stuff for you and acts before it becomes a problem, schedule a quick call with our team and we’ll put a plan together.