I have a ps2 mouse and it has been working fine. Now the mouse only moves up and down. I didn't try to clean it because I felt it was something more that that. So, I bought a new ps2 mouse and this one only moves left and right. I powered down the system, disconnected it and connected the old one again to make sure I had a good connection..it still moved up and down. I went to device manager and removed the mouse and let windows redetect it, but still got the same movement...up and down. I know it has to be something simple...I just can't think of what it is. This has happened to me once before, a couple of years, but for the life of me, I can't remember what I did to correct this problem...HELP PLEASE!