Verified answer

you probably have 32 bit

There are two versions of vista. One for 32bit processors and one for 64bit processors. Goto control panel, then the system icon. That page will tell you what your processor is and if you are 64 or 32bit. :) Then you can download the appropriate driver :)

The 32 bit driver will work either way. Go into the system panel and tell me what processor you have.

32 bit

you would know if you had 64 bit (not commonly used)

32bits