Nepali: Thanks for the help on this one. I'm starting to think there is no way to restore the dll's quartz.dll and msxml3.dll at the same boot as XPize was installed with those 2 dll's. Ive tried now with this in a cmd file: rem Gjenoppretter ukompatible dll filer installert med XPize. sfc /purgecache regsvr32 /u /s %WinDir%\system32\msxml3.dll regsvr32 /u /s %WinDir%\system32\quartz.dll del /q %WinDir%\system32\msxml3.dll del /q %WinDir%\system32\quartz.dll copy /y "%~dp0msxml3.dll" "%WinDir%\System32" copy /y "%~dp0quartz.dll" "%WinDir%\System32" regsvr32 /s %WinDir%\system32\msxml3.dll regsvr32 /s %WinDir%\system32\quartz.dll and running this right after XPize installation with ALL dlls (as there are no way to exlude specific dll's) does not seem to work. PowerDVD and WMP still crashes (at next reboot). BUT HOWEVER if I run the command from above after the next reboot AFTER wpi has installed, and yet again reboot then it works! Nepali or anyone else, any idea on how to make this work at the same boot as XPize installs?