I'm running XP SP3 on an Hp Pavillion 1330n with an ATI sound card and Radeon video card. I played 4.84 extensively but the newer mod won't run.
I did upgrade to Kaspersky Internet Security 2011 since then, but I've moved Freelancer.exe to the Trusted section and set the web AV settings at minimal levels for optimum performance.
Deleted previous version (4.84 from FLMM and no other mods are active.