Does automatic restart after updates close open programs correctly?

Say I have Firefox open, and updates come in that require a reboot, and my downtime is after 5PM, and I'm not at the computer, and Windows decides to reboot by itself. Does Windows close Firefox correctly like a person would if they were done with it, and click the X button to close it, or does it just brute force close it like a person would by Task Manager? I'm just curious because automatic reboots happened several time with programs open (including Firefox), and when I would open Firefox again, I never get a "Firefox did not close properly", or anything like that. I don't want to have to close everything open just in case of an auto reboot if Windows forces programs closed, so I'm hoping Windows is smart enough to close open programs correctly.

Thanks for the reply, and I understand about not saving data, but I'm asking more about how Windows handles open programs in general. Even smaller ones like Calculator, or say I had Windows Media Player open with music playing, and the last song ended, so it's just sitting there open not doing anything? Would Windows shut them down normally, or force close them?

Bobby Phoenix said:

Thanks for the reply, and I understand about not saving data, but I'm asking more about how Windows handles open programs in general. Even smaller ones like Calculator, or say I had Windows Media Player open with music playing, and the last song ended, so it's just sitting there open not doing anything? Would Windows shut them down normally, or force close them?

Windows forcefully terminates open applications. Closing an application by clicking the close button isn't a reliable method. By default this will end the program but the program may intercept this message and do whatever it wishes. Clicking the close button may ask for confirmation, minimize the application, or even do nothing at all. Actual closing of the program may require some application specific procedure such selection of a menu item.

However, before the application is terminated Windows will send it a message that a system reboot or shutdown is imminent and it should prepare accordingly. It is given a short period of time in which to save data and any other cleanup the developer deems appropriate. In XP and prior an application could actually abort the shutdown but it was found that some applications abused this privilege so in Vista this was made considerably more difficult.

LMiller7 said:

Windows forcefully terminates open applications. Closing an application by clicking the close button isn't a reliable method. By default this will end the program but the program may intercept this message and do whatever it wishes. Clicking the close button may ask for confirmation, minimize the application, or even do nothing at all. Actual closing of the program may require some application specific procedure such selection of a menu item.

However, before the application is terminated Windows will send it a message that a system reboot or shutdown is imminent and it should prepare accordingly. It is given a short period of time in which to save data and any other cleanup the developer deems appropriate. In XP and prior an application could actually abort the shutdown but it was found that some applications abused this privilege so in Vista this was made considerably more difficult.

Thank you for the explanation.