To remove a device from your account, hit your web browser and sign in to your Microsoft account.
Click the Devices menu and then choose “Your devices.”
The “Your devices” page shows all devices registered to your account. You can also view just devices that have apps & games, music, or movies & TV shows. But unless you have a lot of devices to weed through, the “Your devices” page is just fine. Find the device you’d like to remove on the list. If you’ve got your devices named well (and here’s a good reason to do that if you haven’t), it should be easy to find. If not, each entry also shows you the model of the devices on which it’s installed, what version of Windows is installed, and (if you have location services turned on) when and where the computer was last seen.
When you’ve located the device you want to remove, just click the “Remove” link to the right.
On the warning page, select the “I’m ready to remove this device” check box and then click Remove.
A confirmation page shows you what device you removed and the exact time and date. Click Back to Devices.
And you’re done. Removing a device from your Microsoft account is pretty straightforward, but it’s good to check in once in a while to keep your device list up to date. Removing devices helps ensure that that old devices you no longer use are not capable of accessing your account and that you don’t run into the ten-device limit for installed apps and games.
Hope this information was helpful.