That is all way too big. Win7 install should be less than 10GB. I would completely reformat. If you want to keep data on the drive, back it up and then reformat.

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth