Lenovo LS500 Laptop. Vista. 160gig hard drive. Has small Service S: partition 1.5 GB, a small Lenovo Service Q: partition 9.5 GB, and the main C: partition. The C: partition is 137 GB but only shows 32 GB free. I only have about 60 GB of data on this drive so I expect to see closer to 65 GB of free space. I've displayed hidden files, defragged, disk cleanup, lowered size of recovery space to 5 GB, installed and ran treesize (nothing shows there), installed and ran CCleaner, erased temp files, etc. Some of those actions helped (was only 11 GB free) but I can't find the rest. Any ideas? Jeff