Macro and Vista

Hi all, I had to buy a new laptop because in the old one the Lcd screen get broken.

I use it for work so I have bought a very good one, with large screen and high performances, but there is Windows Vista installed (In the old one there was xp).

The problem is that if I run the same macro in both the pc the new one is 9 time more slow than the old one: the old pc took 10 second and the new one 90.

I have tried with program for benchmark calculation and the new pc has been very fast.

I have only got problem with the macro but it simply orders a list with 9000 rows and 8 columns.

I have reinstalled office and the sp1 but nothing.

The problem is that this excel file will grow up but I can't downgrade to xp for driver and warranty problem.

Does anyone know why vista is so slow using the macro and how can I fix it?

Thank you very much