You're working on an important document, making great progress -- when suddenly your laptop freezes. The mouse won't move, pressing Ctrl+Alt+Delete does nothing, and all the hard work you've done is lost. For some reason, this keeps happening. Virus scanners detect nothing, disk defragmenting didn't work -- your laptop still freezes. The last resort, short of wiping the hard drive clean, is a hard reset. A hard reset will restore certain settings back to factory defaults, which may be enough to fix your problem.