Hi i have just bought windows 7 profesional and found out that i will need to clean install. when i do this will things like internet explorer and all the basic bits still be there? as if i need to re install everything i dont think i have a internet explorer disc?

At present my new computer has come with windows vista home premium but the programme is naff the system is too slow for what I want it for, my old computers programme is windows xp proffessional and runs much faster then vista home premium