Yes and no. It'll wait until you're not using the computer to install overnight, when you've been away for a while, whatever. What it won't do as far as I've s

Yes and no. It'll wait until you're not using the computer to install overnight, when you've been away for a while, whatever. What it won't do as far as I've seen is allow applications to block the restart if perhaps they contain unsaved data. Your unsaved data is not Windows' problem, and after the restart it won't be yours either - if the app doesn't support hot exit/autosaving of modified buffers/documents then recreating unsaved data will be your problem (but still not Windows' problem).