Start with this check.
Record the warning and connect directly to a compatible port without a dock where the manufacturer permits. Compare a suitable data cable and preserve drives containing important files.
Do not format, initialise or run writing repairs on the only copy of important files. Avoid unfamiliar driver updaters and disconnecting a drive during writes.
Which situation matches yours?
Let’s go step by step.
0 of 5 checks completedMark each check to keep track during this visit.
Identify the failing device
Separate storage, phone, camera, monitor and dock. Record warning and port. Two devices sharing a connector do not necessarily have the same problem.
USB-C describes the connector; features also depend on computer, cable and device.
Simplify the connection
With no copy or transfer running, safely eject where applicable and connect directly. Use manufacturer-specified external power if the device requires it.
Working directly focuses the next investigation on the dock or power supply.
Compare compatible cable and port
Use a known cable supporting the required function and a compatible computer port. Check manufacturer specifications for video or advanced features; USB-C ports are not identical.
Successful charging does not establish support for the data or video connection attempted.
Read Windows device status
Open Device Manager and inspect the affected device’s status if listed. Record the exact code. Avoid removing every port’s drivers or the keyboard merely to test one accessory.
A code and a specific connection provide a useful official-help query.
Verify with another comparison
Where safe and undamaged, try the accessory on another authorised compatible computer. Stop before repairing an erroring drive containing irreplaceable files. Review official computer or dock updates.
Failure on two computers with suitable cables points towards the accessory without identifying a particular repair.
When to stop and ask for help
Preserve the device and seek help for damage, repeated drive disconnects or a format prompt over important data. Connection tests do not automatically recover or repair files.
Does a step differ from what you see? →Common questions
Does every USB-C cable support monitors?
No. Cable, port and video mode must all be compatible.
Is formatting a suitable drive-health test?
It can remove data access and is not an appropriate first test for needed files.
Should I get a driver from an advertisement?
Use Windows Update or the exact computer or accessory manufacturer.
Sources and review
Project owner: Eudald Ferrer Ibáñez. Report a correction.
This guide uses official documentation and our own troubleshooting sequence. Menus may change between versions. Documentation reviewed on September 28, 2026; practical device testing is still pending.
How we review and correct guides →Have you identified the problem?
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