Reply to Help, S2 keeps droping out

After a few minutes of playing my s2 keeps unmounting from my laptop. Idk whats going on I just set it up today. running windows 7 AMD Turion II Ultra Dual Core mobile m620 2.50 GHz, 4 gig ram, 64 bit system.

I cant figure out whats wrong. maybe I should delete everything and do a fresh install