Actually I've already done that, and I do reclaim space overall - but it doesn't make sense of why Vista tells me that my account overall is using 134 GB, but when you add everything up it only equals 80 GB. I'm still missing 50 GB even if I have shadow volumes turned off.

If I check my shadows, this is the result:

C:\Windows\system32>vssadmin list shadowstorage
vssadmin 1.1 - Volume Shadow Copy Service administrative command-line tool
(C) Copyright 2001-2005 Microsoft Corp.

Shadow Copy Storage association
For volume: (C\\?\Volume{7e938e18-d18f-11dc-b957-806e6f6e6963}\
Shadow Copy Storage volume: (C\\?\Volume{7e938e18-d18f-11dc-b957-806e6f6e69
63}\
Used Shadow Copy Storage space: 733.375 MB
Allocated Shadow Copy Storage space: 1.172 GB
Maximum Shadow Copy Storage space: 17.396 GB

From the properties of my vista user account I'm using 134 GB and yet when I add up the folders and files manually I only get 80 GB it still doesn't answer the question of where are my other 50 GB?