When your PC keeps failing to get windows update keeps failing, the very first step you should do after restarting your computer is to check your internet connection. Windows Update Troubleshooter can be your helper in the first step of your journey to fix Windows Update failures. In addition to making sure your system has enough disk space, temporarily disabling antivirus software that could be blocking updates is a good idea as well! Deleting the SoftwareDistribution folder (where Windows Update keeps its cache) and restarting the update service will help clear the Windows Update cache for you. Besides fixing the system files corruption with SFC and DISM commands in Command Prompt, manual installation of the update from the Microsoft Update Catalog is at times the solution when the update fails.