Unknown Device in Device Manager Identify With Hardware IDs
Windows says "Unknown Device" — but the device itself knows exactly what it is, and it will tell you through a code called the Hardware ID. This guide shows how to read that code like a technician.
✍️ Technical Anshu🪟 Windows 10 / 11⏱️ 10 minute fix
🎥 Watch the full process in the video — all 4 driver methods, step-by-step
Every device in your PC carries a permanent identity code: the Hardware ID. It contains a vendor code (who made it) and a device code (which part it is). Windows shows "Unknown Device" only because no driver matched that code — but you can read the code yourself, search it, and land on exactly the right driver instead of guessing. This is the method professionals use on strange hardware, and it is easier than it looks.
🔍 VEN_8086 = the vendor (here, Intel)Maker identified
🔍 DEV_A71D = the exact device modelPart identified
👆 A typical Hardware ID (illustrative example). The first line is the most specific — copy that one for your search.
1
Open the Hardware IDs of the Unknown Device
Right-click Start → Device Manager → open Other devices
Right-click the Unknown Device → Properties
Open the Details tab and set Property to Hardware Ids
Right-click the top line in the list and choose Copy — it looks like the panel above
2
Read the Code and Search It ⭐
Note the two codes: VEN_xxxx is the maker (8086 = Intel, 10EC = Realtek, 14E4 = Broadcom, 1022 = AMD, 8086-style codes are standard)
DEV_xxxx is the exact part number
Paste the copied line, or just VEN and DEV together, into a web search — results name the device plainly, for example a specific network card, chipset part or card reader
Now download that device's driver — from the device maker's or your PC maker's official site, not from random driver sites the search may show
Once you know what the device is, the remaining work is the normal driver process shown in the video: manufacturer site first, Windows Update optional drivers as the cross-check.
3
Install and Confirm
Run the downloaded driver installer and restart
Reopen Device Manager — the Unknown Device should now appear under its real name in the right group, without the yellow mark
If it moved but still shows a mark, the package was for a similar model — recheck the DEV code and download again
Repeat for any remaining unknown devices; on many machines there are two or three, often the chipset, card reader and a sensor
4
Shortcut for the Most Common Unknown Devices
Before the deep search, know the usual suspects after a fresh install: PCI Simple Communications Controller is the Intel Management Engine (fixed by the chipset package), PCI Memory Controller and SM Bus Controller are also chipset parts, and IDs starting with ACPI belong to the maker's power and hotkey drivers. Installing your PC maker's chipset driver package first clears most of the Other devices list in one go.
🛑 Honest safety note: the search will find driver-download sites that promise one-click fixes for a fee or bundle extra software. Use the ID only to identify the device — then get the driver from the official maker. Identification is detective work; installation should stay official.
🎥 Watch the Complete Process in the Video
All 4 methods to download and install drivers — live demo, step-by-step.
No. Unknown Device simply means Windows found a piece of hardware but has no driver for it, so it cannot name it. It is very common after a fresh Windows install and disappears once the correct driver is installed.
What are ACPI unknown devices?
Devices whose hardware ID starts with ACPI are motherboard power-management and system devices. They are almost always fixed by installing the chipset driver and the maker-specific ACPI or hotkey driver from your PC manufacturer's support page.
Can I just delete the Unknown Device?
You can uninstall it, but Windows will detect the same hardware again on the next restart or scan and it will come back as Unknown Device. Only the correct driver removes it for good.
This guide is based on the Technical Anshu driver video • Stuck on any step? Ask in the video comments — you will get a reply there 🙏