Windows Update keeps your computer up-to-date with latest, recommended security updates and performance enhancements. As default, the scan is scheduled to run on a periodic basis. The updates help to deal with potentially unwanted files, malicious objects, fix programming bugs and improve your computer’s performance.
Sometimes, the update download-install process fails with the 0x80070070 error. The problem primarily arises when you don’t have sufficient disk space to download updates.