When you spent a grand on this machine did you have a role for it in mind? Or did you just walk in to a store, looked at the sleek black machine and thought you'd get a new paperweight?!
Sorry. Trying to be funny.
My point? If you have any music background you must have an idea what you want to do with the machine? Start by deciding you want to .... say, load a sample and timestretch it. Then use the manual, at the back there is an index, this is in alphabetical order, to find out how to load a sample etc etc etc.
I would start with the saving / loading chapter and then also search this forum
http://www.mpc-forums.com/search.php to find out best practices for saving.
http://www.mpc-forums.com/viewtopic.php?t=50011
But the best thing about hardware machines is that there is always a button to press - With computers you have to search the help, find the menu etc. But with hardware you can ...'press that button' see what it does. This way you aren't learning the same way as everyone else here (me inc)
p.s. the windows button lights up if there are further parameters to modify