Hey! I have windows 8 and i want to reinstall it.I have a laptop and its already 4 years old and at this point, its just slow, full of programs that im way to lazy to delete,so i decided to reinstall windows.The thing is i dont know how.For example, i need a USB and then download the disk image file from the microsoft website? I want the free version of windows,and can anyone tell me the difference between the paid one and the free one?I want to reinstall it completely, no programs from before that i downloaded myself,i want a clean reinstall.When i hit reinstall will it ask me for the USB? when do i insert it? Am i going to choose where the windows reinstalls or will it reinstall on C? Cause i have no idea where to put it and i dont want to destroy everything,i want it on C. Thanks in advance.