Best program to visualize file system usage on Windows?
My daughters Windows Vista laptop has a 160Gb hard drive with the main C: partition set to 135Gb.
Windows is reporting that the drive has about 2Gb of free space, but I can only find about 65Gb of files. I've tried this by opening C: in Explorer, doing Control-A and then "Properties". And I've tried using TreeSize Free. And, yes, I've changed the folder options to display hidden and system files.
Any suggestions? I'm worried there may be a rootkit on the machine.