Since updating to Windows 10, I’ve encountered an issue twice where the monthly updates failed to install. Each time, the solution involved erasing/flushing the Windows update file cache and retrying.
Here’s how to do this in case you need to accomplish the same thing:
Flush the Software Distribution Folder.
Run Command Prompt as administrator. In the CMD box that appears on the computer screen, enter the following strings of text, one at a time, and hit Enter.
net stop wuauserv
net stop bits
Now browse to the C:\Windows\SoftwareDistribution folder and delete all the files and folders inside.
If the files are in use, restart your device. After rebooting, run the commands above again. Your Windows Store App needs to be closed by the way, so do not start it.
Now you will be able to delete the files from the mentioned Software Distribution folder. Now in the Command Prompt windows, type the following commands one at a time, and hit Enter:
net start wuauserv
net start bits
Reboot. If you are using Windows Update try using Microsoft Updates or vice versa.
Taken from:
- Fix: Windows Updates fail to install in Windows 7 / 8 / 10
http://www.thewindowsclub.com/windows-updates-fail-to-install - Remove the temporary update files that Windows uses to identify updates for your computer
http://windows.microsoft.com/en-us/windows/windows-update-error-80070002
Kurt Shintaku's Blog 