OK.......i redid a format after using destructive pattern testing, and went into FDisk and created a primary DOS partition. However this time , the maximum partition size has been reduced from 773 Meg to 504 Meg ???
Anyway, i created a partition of size 500 Meg, set it as active and restarted my system. At the A:\> prompt i typed c: and it recognised the c: drive !!!
However, when i tried to format (format c: /s)....it now says "Invalid media type reading drive C - Abort, Retry, Fail?"
Any command relating to the C: drive , be it dir, scandisk, label etc....all give this message.