Hi folks
i started my machine this afternoon and just thought I would check my drives. I found I had an extra one,  "drive  D"   it's 100 gig and only has recyclebin and System volume info  on it.
anyone happen to know anything that could cause this?

mainboard p9x79* Cpu i73800* Ram 16 Gig Kingston HyperX* Vid card ATI 5770*
 Two esata 2  blacX Docking Stations
Hd's Samsung 250 GiG Sata 3, 3 Raptor 150 Gig, 1 valosa Raptor 160 Gig*
 DVD's two sata2 DVD drives one is a Blue-Ray.
 Antech P190 case with two power SUPPLIES one 600 watt the other 500 watt.
I'm running win7 right now but do use ubuntu about half the time.   I found out where it CAME from but I have no Idea how it was created.
for some reason my system  decided to partition my SSD drive. I never did it
sooo    no one else in my house likes computers or would care to turn mine on.
I usually have to start a esata drive to start it so they wouldn't have a clue.
 Any suggestions as to how this can happen?  You sure it's not 100 Mg ? ?

If it is it's created upon Windows install...