HP support told me: for a 750 GB Hard Drive, about 50 GB is reserved for indexing or for saving File Allocation tables, it is pretty normal, and it happens with all Hard Drives installed on the PC. Also pointed me to this article: http://h10025.www1.hp.com/ewfrf/wc [...] 1002_USEN.
NOTHING is missing. 750,000,000,000 bytes is seen by M$ Windows as "698.49 GB" IF you understand that M$ says a "GB" is really 1024 x 1024 x 1024 bytes. They just re-defined the term "GB".
The use of up to 50 GB for a special recovery Partition and the File System on your active drive comes AFTER this "conversion" of size terms, so the actual space available for files on your C: drive, including the Windows OS, will be less than 698 GB, more like 650 GB.
Message edited by Paperdoc on 10-21-2009 at 03:51:41 PM