You need to use something called remote desktop on a windows machine. This needs to be enabled on both computers. Or you can use WinVNC which will work in the same way. Again both PC's will need the...
nothing, it cant do anything without been told.unless someone has coded it to do something in (for example) an hour and no one was on the computer an hour later but thats still been told to do...
they mave become smaller, faster, and much more powerful. It would take a computer the size of a house to do half of what your desktop model can do today.