Originally posted by TheMajor
Some files&folders may be hidden. Check folder options to unhide hidden folders/files. Start>settings>control panel>folder options.
The Major's back. where have you been?
Delete everything in your recycle bin, clean your
temp folder and more sure you delete all but the most recent restore point (this is what is probably taking up most of the space)
whenever you get a chance, backup your data, make 2 partitions (20 for OS, 160 for your data) and make the second one, the my documents folder and turn system restore off of the second partition.
copy your data and music to it