Update
IT TAKES UP TO 6 HOURS FOR WINDOWS TO FULLY UPDATE
Updates to the latest version of Microsoft Windows are expected to take up to 6 hours. David Gayer, Microsoft's program manager, made the announcement in a blog post. According to him, for Windows Update, it is necessary to be connected to the Internet for two hours continuously and a total of 6 hours of Internet connection will be required including install.
Replying to a comment on his blog post, he said, "It takes only a few hours to complete the main task of updating. The 6 hours I mentioned is for devices that are not used continuously. When there is no continuous connection on such devices, it seems to stop and restart and thus take more time."
He said, "Even in updates, some things happen from the beginning as soon as they are disconnected from the network. From that point of view, if both are taken as the basis, it is seen that 6 hours will be required after the completion of the whole process."