Vista - QPCapSvc service hang QPSched service hang

Hi,

I have Vista home premium and HP Pavilion dv5 laptop. My system hangs frequently (21 times in last 30 days). The mouse movements respond, but the applications do NOT. Even Ctrl-Alt-Del does not respond. I force a hardware restart to recover from this situation. When I go to "Problem reports and solution", I see two problems with the time stamp same as when the system stopped responding. They are:

1.QPCapSvc service hang
2. QPSched service hang

I read on Internet and found the same problem reported by another guy on HP Pavilion laptop. If I understand correctly, services starting with QP are relate to QuickPlayer application. They are Quick Player background capture service and Quick Player scheduler. I do not do anything related to Quick Player when the system hangs. Has anyone else seen similar problems. Is there some solution/workaround to fix this, other than stopping these services on system for ever?

Thanks,
Prabhat