QUESTION: Fix punctuation: MSMPEG2ENCDLL device cant workNo sound Actually in most cases device problem is because of sys files
ANS: MSMPEG2ENC.DLL device can't work/No sound: Actually, in most cases device problem is because of .sys files.

QUESTION: Fix punctuation: Its members all of whom subscribe to a code of ethics are committed to the concept of shareware as a method of marketing
ANS: Its members, all of whom subscribe to a code of ethics, are committed to the concept of shareware as a method of marketing.

QUESTION: Fix punctuation: Transfer from Valmontone Rainbow Magicland to Rome Fiumicino FCO airport
ANS: Transfer from Valmontone Rainbow Magicland to Rome Fiumicino (FCO) airport

QUESTION: Fix punctuation: All symbols pay left to right except scattered Volcano symbols which pay left to right andor right to left
ANS:
All symbols pay left to right, except scattered Volcano symbols, which pay left to right and/or right to left.