How to adjust disk space in Windows Vista
Did you know that Windows Vista, by default, allots an obscene 15% of a computer's hard drive space to System Restore. So, for example, if you have a 200GB hard drive then 30GB is devoted to system restore. Who needs a 30GB system restore? It seems Microsoft doesn't seem to have too much confidence in the stability of its latest operating system. You can change the amount of space that's system restore uses; however, it is far from easy to do so. You will need an account with Administrator privileges and use the command line utility "vssadmin." Read MVP website's howto tutorial on how to use vssadmin.