Remember - This is a public forum so never post private information such as email or phone numbers!Ideas:Programs you are having problems with Error messages Recent changes you made to your computer What you have already tried to fix the problem 1 person needs an answerI do too

Hi ETXTATERBUG, - Which are the files that you are referring to?- Is the format of the files changed? If yes, what’s the file format of the files that you are referring to?- Are you trying to synchronize the music files to any device from Media Player?- What’s the recent change that you made to your computer after which this issue has started to occur? "Your question does not contain all the required information needed for us to help you. Please re-write your question, this time make sure you have all the needed information and we'll try to help."Refer this link for more information on:How to ask a questionRegards,Divya R – Microsoft Support.Visit our Microsoft Answers Feedback Forum and let us know what you think.