In its standard configuration Windows System Restore can over time, use up a
surprising amount of your hard drive storage. Thankfully it can easy be
reconfigured to use less space without affecting the safety and security of
your system. Here's how you do it.
http://www.techsupportalert.com/content/how-control-amount-disk-space-used-system-protection-system-restore-windows-vista7.htm
