I bought this unit and with my desktop and laptop and after installing the cd (which the direcions say u should) it would not work at all. Occassionally, there would be blinks of the light going off but then it would die. I dont know whether this was a defective unit or its just did not work, but i returned it within an hour. I checked the Sandisk website and after following the directions the technical support gave me it still didn't work. I own a dell inspiron 8600 and a cyberpower system.