xp login help

[apna_azmi]

friends mujeh ap logon se yeh pochna tha k mey yeh chahta hon k mey jab bhi apna ps on karon to direct desktop p aajaey mere user pey password nahi hai pa phir bhi woh user name & password mangta hai jab mey inter karta hon to jab login hota hai
mey control panel mey user mey jab bhi USE THE WELLCOME SCREEN & USE FAST USER SWITCHING pey chack lagata hon to mere pas yeh msg aajata hai mene sab kar k dekh lia or yeh service uninstall bhi nahi ho rahi hai mene dos se bhi kar k dekha hai kia koi mujeh iska hal bata sakta hai???????????

Thanks