Yes I was thinking it was filling up rather quickly. I'm not home but basically I have Windows 7 Ult 64 bit, DVDFab, Adobe CS5 Master Collection(5GB alone), Microsoft Security Essential, iTunes, Steam(Counter Strike Source only game downloaded), WinRAR, Mozilla Firefox, Microsoft Office Enterprise 2007, ConvertXtoDVD, PeerBlock, uTorrent, PCProbe(PC temp and fan speed reader came with mobo), and that's about it I guess.
I guess I was just so used to XP and it must be smaller than Windows 7 Ult 64 that took 25GB