Interesting. I guess it's down to more housekeeping

A useful tool for identifing large directories is
treesize free.
Also, you could try the Vista SP2 cleanup tool (
http://technet.microsoft.com/en-us/l...36(WS.10).aspx) - it freed up a fair amount of space on my laptop.
Finally, you could see whether Shadow Copy is enabled. VSSAdmin can show you how much is allocated (wasted) to it - not needed unless you are sharing your laptop disk on the network. (see
here)