An easy way to fix an update that continuously tries to install and fails or an update download that stalls is to clean out the Windows Update Cache.
To do this, follow these simple steps:
- Open a Command Prompt (Run As Administrator).
- Type “net stop wuauserv”.
- Type “cd /d %windir%”
- Type “rd /s SoftwareDistribution”
- Type “net start wuauserv”
Now re-run windows update