Hi Krisshp.
Have a look on your computer for how many Volume Shadow Copy files you have, and see if you can delete some or all of them. This may help.
http://www.vistax64.com/vista-file-managem...py-c-drive.htmlVista by default reserves 15% of disk space for defragging.
As Volume Shadow Copy takes up more and more space as you defrag, or do other stuff that makes Vista track changes to files, then to retain that 15% Vista starts to delete System Restore points. This is probably why you don't have any.
So you have the situation it seems where your available free space can seem to disappear, and along with it, as the process continues, your System Restore Points.
Again, I don't have Vista, so can't physically check this process, but the only way it seems to get back your free space, is to delete Volume Shadow Copies.
And maybe we can get some input from Vista users on here who have practical experience of this, and could possibly give you clearer instructions on the "how to".
If you still have worries, or need more advice, don't hesitate to post back and say so. You're not alone with this problem, and your not alone in having concerns over it.