Formatezi partitia C sau cea cu windows-ul, daca nu ai ceva important in celelalte partitii poti sa le formatezi. Uite un video in care vezi cum se instaleaza windows xp sp2
Part 1 http://www.youtube.com/watch?v=8xS9o0Y-L2c
Part 2 http://www.youtube.com/watch?v=r64xt5CP-70
Part 3 http://www.youtube.com/watch?v=GJrHYYbD3Ig