Tell whether your computer has the 32-bit or 64-bit version of Windows Vista

Problem: You don't know whether or your PC is running the 32 or 64-bit version of Windows Vista

Solution: Start > type in "msinfo32.exe" > Enter > look for "System Type"
If your system type is listed as....
x86-based PC = 32-bit version of Vista
x64-based PC = 64-bit version of Vista