need help for dell optiplex gx260

some one help

Honorable
Dec 22, 2013
6
0
10,510
i have a optiplex gx 260 i bought it at a yard sale it had xp pro a fake copy on it so i put a windows 7 oem os on it i have two 40 gigs hard drives on it but can only use one i can find it in the bios and in the system files and it says it is working i even have a western digtil scan program that say it good to go but will not show up in the start window under computer how do i fix this i real need this hard drive i have to dell and microsoft but no luck hope some one out there can help