More likely it is because of broken software driver get stucked. Just uninstall all related driver may solve the problem. I just got ATI VIVO driver last night. It will never work correctly until you reinstall 1st ATI driver, 2nd PowerDVD7. Then the PowerDVD can do the auto-detection. 
Anyway, you are even living in VCD world, not interesting in HD-DVD field yet. 
This answer gets better, but not close.
所有跟帖:
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                    呵呵,俺有HDTV,ATI TV Wonder 650 HDTV卡 硬件压缩,录
                     -tty- 
                    ♂                    
                        
                    
                                                            
                    
                    
                                        
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                        12/06/2006 postreply
                                                16:07:42
                    
                    
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                    什么时候玩腻了退了它?:D
                     -德州老外- 
                    ♂                    
                        
                    
                                                            
                    
                    
                                        
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                        12/06/2006 postreply
                                                17:08:49
                    
                    
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                    这都是保留节目 看完HDTV没法回到一般的电视了
                     -tty- 
                    ♂                    
                        
                    
                                                            
                    
                    
                                        
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                        12/06/2006 postreply
                                                17:35:51
                    
                    
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                    高清晰土豆?HD Couch Potato?
                     -德州老外- 
                    ♂                    
                        
                    
                                                            
                    
                    
                                        
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                        12/06/2006 postreply
                                                17:56:32
                    
                    
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                    两位还记得我吗?帮我介绍个手提吧
                     -evermiss- 
                    ♀                    
                        
                    
                                                            
                    
                    
                                        
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                        12/07/2006 postreply
                                                07:26:31
                    
                    
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                    你如果能回国,买联想的机器其实很不错的。
                     -德州老外- 
                    ♂                    
                        
                    
                                                            
                    
                    
                                        
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                        12/07/2006 postreply
                                                13:11:45
                    
                    
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                    那你帮我介绍一个吧,那昨天提到的被
                     -evermiss- 
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                        12/07/2006 postreply
                                                15:29:25