i only have 10 percent of the drive space remaining on my vista.
can i somehow convert some of the 79% free space in c drive to accomodate this problem? i have also heard of having to a
extra stick of ram? which one if either, is appropriate for
this type situation?

mike west, March 2008

Hi Mike, usually your D: drive is reserved to your recovery files. I suspicion you've been saving files to the D: drive instead of the C: drive. I know it's confusing but they are on the same hard drive. If you have unallocated space you can use a program like Partition Magic to assign the unallocated space, but you'll want to allocate that to you C: drive. You can check the available space by going to "START" "MY COMPUTER". I think that's what you're seeing - not "unallocated" but "Free Space". If you have been saving music, videos or photos to your D: drive you can move them to your C: drive using Windows Explorer (START, PROGRAMS, ACCESSORIES, WINDOWS EXPLORER. Moving them to you C: drive will fix the warning message. If you're unfamiliar on how to do this you can email me (shopbruce@gmail.com) and we can see if we can walk you through it. Hope this helps!

Bruce, June 2008

http://www.mendmy.com/answers.php?id=129670

Follow the above link.
The symptoms and asked questions are alarmingly similar.

Redders, April 2008

Is your harddrive partitioned? You cannot have 10% remaining and 79% free unless you allocated a huge part of your harddrive to memory. If you do not have enough memory - Vista like 1gb of memory - then the computer uses your hard drive as memory and makes the computer very slow.

John d, April 2008