I think I have the same tuner Leadtek DV2000
(Well its Leadtek, I know that).
I dont know whether its coz I use Hyperthreading
or not, that makes it hang. But on the odd occasion
it did hang. And um nope XP doesnt have
XP drivers for this card.
And well usually you're meant to install
drivers before hardware, but in this case, its the
hardware before the drivers/software! Otherwise
the drivers, or software wont install at all!
I tried the update program/drivers from Leadtek
and it still hung. So, whether I used the old drivers
(from the CD) or the new from the site, it didnt matter!
It froze the whole system and the only thing I could
do was to reboot. I couldnt do anything otherwise.
Mine is actually going to get replaced
(Its in the shop). And should be ready next week.
I did try it in a non-HT system, and it didnt hang once.
(When I turned it on with the remote, or within
the program itself).
So, with mine anyway, the Tuner software may not
like like Hyperthreading, on this system I'm on now.