As far as I know, XP can only go up to 9.0c, Vista and 7 are needed to run 10 or newer. And that shouldn't matter anyway, tons of other games work fine, it is only STO that runs out of memory and then crashes.
I rarely crash from the tailor. When I crash, it is when I load a new ground mission after several ground and space missions. Or I crash when there is a patch and I decide to turn up my anti-aliasing after not crashing for a while thinking "did they fix it? o, no they did not...".
I thought they had directX 9.4 or something like that - I haven't touched XP in a while