hi im using xvid4psp v 5.10.305.0 on windows xp OS to encode videos, after every video encoding ,when i close it and try to change some settings the computer reboots but this does not happen when i close the program and start it again .

Also im using haali renderer as directshow video output as i find the quality to be the best but there is huge difference in quality on windows xp and windows 7 with haali renderer . why is the quality better on windows xp than that of windows 7 and the encoded videos look better on windows xp than windows 7.......