I Need Help!!!!!

I Downloaded A Pindlebot For D2 Expansion, It Turned Out To Be A Trojan, And The Guy Went In And Took All My Stuff, Thats Not My Main Problem Though. I Was Wondering If He Can Still Se My Password If I Log In Now? Or Other Accounts Im Really Worried I Want To Start Over But I Cant Because If He Knows My Password Everytime I Log In He'll Just Keep Taking My Items Can You Plz Post Any Info Of How To Gt Rid Of The Trojan File And If He Can Still Find Out My Pass, Thanks