Please check this post :
http://forum.chris-tv.com/index.php?sho ... #entry2651
This is posted on Microsoft Site :
When you use a the TV tuner feature of your soundcard, the TV tuner program may stop responding (hang).
This problem may occur if your processor uses hyperthread technology.
A supported fix is now available from Microsoft, but it is only intended to correct the problem described in this article. Only apply it to systems that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Windows XP service pack that contains this fix.
To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:
http://support.microsoft.com/default.as ... ];CNTACTMS
For more details check : http://support.microsoft.com/default.as ... us;Q817589