ok i had a prob with my primary ide controller which wasnt solved here . http://www.thinkdigit.com/forum/viewtopic.php?t=7595&highlight=controller anyway , any drive i attached to my primary ide controller would just disappear after sometime , while running or simply after a restart . i thought i fixed the prob by actually hitting the side of my tower , which showed my drives in the bios . i tightened up all the screws and it seemed to work , until... while operating my mouse started stuttering . so i removed the driver . it still did it , each time it stuttered , i check my computer and the drives are gone . i adjust the mouse port and it shows . i tried swapping k/b and mouse port , but k/b doesnt work that way . So is there some setting i need to change in the bios to control the mouse ?? what connection does the mouse have to the ide controller anyway ???? is there any thing in the bios thats making mouse and drive clash ??? using ps/2 optical mouse .