Hello,
U can use these steps to manually remove PowerDVD.
Reboot your PC and install it.
Windows XP/Vista 32 bit
1. Remove "C:\Program Files\CyberLink\PowerDVD"
2. Remove "C:\Program Files\InstallShield Installation Information\{6811CAA0-BF12-11D4-9EA1-0050BAE317E1}" folder
3. Run regedit
(1) Remove "HKEY_LOCAL_MACHINE\SOFTWARE\CyberLink\PowerDVD"
(2) Remove "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{6811CAA0-BF12-11D4-9EA1-0050BAE317E1}"
(3) Remove "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\InstallShield Uninstall Information\{6811CAA0-BF12-11D4-9EA1-0050BAE317E1}"
(4) Remove "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\InstallShield_{6811CAA0-BF12-11D4-9EA1-0050BAE317E1}"
Windows Vista 64 bit
1. Remove "C:\Program Files(x86)\CyberLink\PowerDVD"
2. Remove "C:\Program Files\InstallShield Installation Information\{6811CAA0-BF12-11D4-9EA1-0050BAE317E1}" folder
3. Run regedit
(1) Remove "HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\CyberLink\PowerDVD"
(2) Remove "HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{6811CAA0-BF12-11D4-9EA1-0050BAE317E1}"
(3) Remove "HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\InstallShield Uninstall Information\{6811CAA0-BF12-11D4-9EA1-0050BAE317E1}"
(4) Remove "HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\InstallShield_{6811CAA0-BF12-11D4-9EA1-0050BAE317E1}"