sneak attack

Have win xp machine in break room on DSL separate from the rest of office network. When windows loads windows explorer tries to contact webpdp.gator.com and is stopped by webroot & zonealarm pro.It will try 4 times using different port each time before it stops. This happens at each boot. Have looked for Gator, Gain,etc. in all the normal “run”registry locales and start folders and find no references any where. Any suggestions ???????