If you receive Windows Update error 800f020b while trying to install updates, an update that you're trying to install applies to a device that isn't connected to the computer. Make sure that all of your devices are connected and turned on, and then try installing updates again. For more information about drivers, see What is a driver?
To see which device is causing the problem, you can review available updates before trying to install them. The device name or manufacturer will be displayed in the list of available updates. For more information, follow the steps for installing drivers and other optional updates in Install Windows updates in Windows 7.
If you continue to see this error, see this automatic troubleshooter
on the Microsoft Support website, or go to the Microsoft Answers
website for more assistance.