Thanxx 4 Replyin' ......... I'm Using Both Optical And Scroll Mouse On A Ps2 Port ....... Also I Have Reinstall The Windows And Still Problem Is There ..(so The Drivers Are Also Alright)..... I Have Connected Fine Workin Mouse Of My Friend To My Pc , But The Problem Still On ....... Whts The Problem I Cant Understand ....the Mouse Flikers Very Much ...some Hardware Eng. Says Its The Problem Of Ps2 Port ... Now What I Have To Do ?? Any Suggestions Plzz