My Hp Laptop

Question

Hey I have a Hp Laptop i just bought last year...To be exact its an HP Pavillion dv9000...I start up my computer and when it gets into the log in screen i type in my password and it just sits there loads my wallpaper but none of the buttons show up or anything...it started happening about a few days ago when my father got onto my comp and started messing with it..i started recieving spyware messages and everytime i tried to enter Norton it wont even open.