May be others here will know better, but I don't believe this is a feature of Windows.
Yo might have to 'train' each application. Open each and if they do not open maximised, then maximise them yourself. Minimise to the Taskbar, then click the Taskbar icon to re-open them. Close the windows down and test to see if it re-opens full sized.
is there a way to simultaneously maximize all the buttons that are grouped together on the taskbar? what i mean is, some programs open up multiple windows, and when i switch to work on other programs and want to switch back later, is there some 'maximize all' function to open up all these grouped windows all at once, instead of reopening them one by one? the 'cascade' and 'tile' functions open them simultaneously, but not in the original arrangement.
there is such a function in ubuntu, called 'unminimize all'.