I can only tell you what "Computer" and "Disk Management" show. When clicking on "Computer" it shows "C:/" to be a total of 442 Gigabytes. The lower box of "Disk Management" shows the following from left to right: System Reserve 100 MB NTFS(Healthy Primary); 96 MB Unallocated; C: 931.31 GB NTFS Healthy(System, Boot, Page File, Active, Crash Dump, Primary Partition) The upper box of "Disk Management" shows an icon that looks like a metal brief case, then "(C:). Simple, Basic, NTFS, Healthy, 442.31 GB's. The second metal briefcase icon below that shows, System Reserved, "Simple, Basic, NTFS, Healthy, 100 MB, 70 MB of free space. Can "System Reserved" safely be deleted in order to expand "C:/"?