In Windows 7, do you keep the "System Restore" function enabled? And if so, do you ever have to use it for anything (and what)? I've always disabled the function, feeling that it's a hodgepodge function for people who just need a quick and easy "undo" function for their computers, not being able to troubleshoot themselves. And it takes a hefty chunk of precious SSD space. So I'm curious if any of you keep it enabled, and if so, how/when/why it's ever relied on.