You can check the followings: • The internet connection is in good condition. • Your DVD/Blu-ray disc or drive has not scratched or damaged. • The destination folder has enough space to save the converted files/folder. If not the issue above, please send the information below and contact us via videobyte@ticketsservices.zohodesk.com: a. Screenshot of the error information. b. Your computer configuration and disc info (Amazon link if available).