Your reputation is that way because of your avatar.
And I use the 64-bit version of Windows 7 because it performs better than the x86 version on my computer. Windows Media Player used to skip a lot.
My computer has a single-core AMD Athlon 64 3500+ at 2.2 GHz with 2.5 GB of RAM. It performs OK with most things, the score is 2.0, but that's because of my graphics card; everything else is 4.0 and up.