This is how my Due drivers look like. Can somebody please compare with his and tell me if there is any difference?http://i78.photobucket.com/albums/j111/COROVICD/DP08_Due-Driver_1_zps0dcd9b12.jpg
There is possibility that cable is the problem. I got my cable from Adafruit and it works well on Leonardo (and on the other PC).This cable is not just normal mini-USB Type B. Normal Type-B cables can't fit into Leonardo or Due?
Any fresh ideas? I am still stuck.
Which one? One where S.M. doesn't work or one where S.M. works?
Yes, I tried 1.5.6-r2.But I am sure that something is wrong with PC. Problem is how to eliminate what is wrong. I've done enough insalling and reinstalling to know that that doesn't change anything. Question is where else to look?