Some of my older games and programs can't run on a dual core.
and I have a 64 bit dual core machine.
So if I have some incompatibility with 64 and with dual core that's a pretty good amount of incompatible programs.


and then I said to make up for the dual core thing you can set a programs affinity to one core, but by doing that your processor speed is halfed for that program. (I.e. one 1.1 core + one 1.1 core = one 2.2 core and a 1.1ghz processor isn't very powerful by today's standards)