OS Win 7 64 Home on Dell Inspiron E1705. The sticks are good, work in other computers. Also, Canon stick is currently recognized in the card slot. Computer does not recognize the drive when I insert the above sticks. Worked when I ran Win 98 SE on this computer. Then didn’t work after I installed Win 7. Can’t find drivers on SanDisk site and Windows update does not find any drivers needed. Device manager doesn’t show any drives with a problem. Device Manager does show “!” for (2) Base System Device(s) under Other Devices but I didn’t think that involved the memory stick slot. Can’t use Dell site because it doesn’t recognize this computer since I didn’t buy the Win 7 software from them. I have no other problems with this computer.