Is this a new problem? Were things working OK previously? Any new hardware or software?
If this is a new problem try a System Restore to a point prior to the problem:
start > All Programs > Accessories > System Tools > System Restore
PowerDVD is a product of CyberLink. Can you find CyberLink?
Did you install this software or was it pre-installed on your computer? Do you have disks for either this software or your computer's software?
Also:
Look in your Event viewer: rt. click My Computer then click Manage then Event Viewer.
Or: Administrative Tools/Event Viewer or Start/Run/ eventvwr
Open the system as well as the application tabs & look for red
X errors. Click error line for details.
Post back the source & event id & Description especially of errors that seem to coincide with this issue.
Also check the Information lines that might coincide with this issue.
How to view and manage event logs in Event Viewer in Windows XP