Windows may report the size of the drive slightly different to Bios (that's 1 area)
The Bios may report the size of the drive differently to the actual size of the drive, this is due to the format; Partition and size of clusters (that's 2 areas)
And finally the size of the drive may be in actual fact slightly different to what is stated on the label (basically tolerance)
Do you have the pagefile on? What is its size? Do you have shadow copies on? Do you have System Restore on?
Those 3 things alone can account for up to 20GB worth of space easily depending on the amount of Restore Points and Shadow Copies you have stored. Pagefile should be around 4GB in size roughly if you let Vista do it automatically.
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R.I.P. Danny L. Trotter
14 Nov 1945 - 4 Sept 2009
Images created by CarnageX | Decaptured...Listen! | Visit Baezware!! | You've been Mak'd! | 儿做好 I do not accept support questions via EMail, PM, IM or my Spaces page! .:|:. This is what happens when an unstoppable force meets an immovable object. Thanks to all the guys on the staff for your support in my time of need. Hefe you are my personal Hero for your contribution.
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Dealing with HDD space 
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