In message <um26jigJIHA.4684@TK2MSFTNGP06.phx.gbl> "Peter"
<nobody@discussions.microsoft.com> wrote:

>Only retail Vista Ultimate ships with both 32 and 64-bit dvd's. If your
>system was pre-installed it most likely is OEM and you would have to purchas
>e anew system. Then format and reinstall.

Purchase a new system?

It would probably be easier to purchase a new copy of Windows (even an
upgrade should do the trick, I believe)