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https://www.dell.com/support/kbdoc/en-us/000151898/how-to-identify-an-unknown-device-in-device-manager
Feb 21, 2021 · If Windows Device Manager is showing an "Unknown Device," after Windows Update has been done.The following steps can help identify the Device to install the correct driver. Open Device Manager.Press the Windows logo key and the R key simultaneously. This should open a Run Box (Figure 1). Figure 1 ; Type devmgmt.msc and click OK or hit Enter.; Device Manager opens (Figure 2).
https://support.google.com/accounts/thread/11202916/unable-to-sign-in-to-device-due-to-a-unknown-error?hl=en
Aug 03, 2019 · Otherwise, we suggest that you actually turn off the device for a minimum of 25 hours (to be on the safe side), as some apps may try to "dial home", and further extend the lockout. After that time, without the correct login credentials, the device is essentially dead in the water.
https://support.microsoft.com/en-us/topic/how-to-troubleshoot-unknown-devices-that-are-listed-in-device-manager-in-windows-xp-3acd0b45-2427-29cb-a85b-3778225fa48f
The device does not have a device driver: When a device driver for a device is not available, Device Manager displays the device as Unknown Device and puts it in the Other devices branch. This is very common with universal serial bus (USB) and Institute of Electrical and Electronics Engineering (IEEE) 1394 composite devices.
https://www.howtogeek.com/193798/how-to-find-drivers-for-unknown-devices-in-the-device-manager/
Jul 27, 2014 · Locate the Unknown Device. RELATED: How to Use the Windows Device Manager for Troubleshooting You’ll see information about Unknown Devices in the Device Manager.To open it on Windows 10, 8.1, or 8, right-click in the bottom-left corner of the screen or press Windows Key + X and select Device Manager.
https://community.t-mobile.com/accounts-services-4/wrong-unknown-device-in-my-t-mobile-com-13678
Sep 17, 2019 · My OnePlus 8T 5G (Unlocked version) says Phone-first Unknown Device but has the IMEI # listed had a rep say it would take 48-72 hours to update because she added the IMEI to my account nothing has changed 72 hours was at 3ish Pm which was 7-8 hours ago
https://docs.microsoft.com/en-us/windows/deployment/update/update-compliance-schema-waasdeploymentstatus
Mar 26, 2021 · Devices that have not sent any deployment data for that update will have the status Unknown. Update paused: Devices are paused via Windows Update for Business Pause policies, preventing the update from being offered by Windows Update. Failed: Device encountered a failure in the update process, ...
https://androidforums.com/threads/frp-unable-to-sign-in-to-device-due-to-a-unknown-error.1164375/
Nov 05, 2019 · 4. Wait for Device to boot up 5. Once booted up you should see a Text Menu (for older devices) or a GUI (for newer devices) - For Text Menu use Volume Up + Volume Down to go up and down. Use Power Button to select. - For GUI tap the option 6. Select the option Factory Reset Device (or anything with those 3 words) 7.
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