When I click the application "FWUpdater.exe", which is under the folder "NW-E50X_V2_0C" which is created after you unzip "NW-E50X_V2_0C", it displays a message saying, "The application cannot run because the file FWUpdaterCom.dll does not exist." even though FWUpdaterCom.dll is in that folder. Therefore, I cannot update the firmware on my Walkman. Thanks for reading my issue.