Per Hansson said:Go Start > Settings > Control Panel > System > Administrative Tools > Computer Management > Disk Management
Here you can see if any space is unallocated and how large (windows thinks) your HDD is
It could be a drive jumper limiting you to 32gb (check the manual for the drive)
Or a BIOS issue in that your mobo does not support drives larger then 32gb
Both can probably be circumvented