Microsoft says that Windows devices need to be online for at least eight hours to get the latest updates and have them correctly installed after they're released through Windows Update.
“Yeah, your computer will be completely unusable for 8 hours while we do something that takes the competition 15 minutes, but we’re not going to change anything” : ) - Microsoft
“Yeah, your computer will be completely unusable for 8 hours while we do something that takes the competition 15 minutes, but we’re not going to change anything” : ) - Microsoft