my friend has a computer that was prviously 2 operating systems...win 95 and win 98SE...it needs to be reformated to because it won't boot up properly...when windows 98SE was put on it, they had a DSL input installed...the drivers were also installed...if i reformat the computer and put windows xp pro on it, will i have to reinstall the drivers or will the windows xp pro setup automatically do this????