Error message

Guys help me!
I’m trying to play a movie and it keeps bringing me error messages like “Explorer has encountered..." and the send/dont send message and i tried different players it didnt helped, is there like a program that fixes damaged avi files?

when we switchon MP3 player the following message is displayed " error reformat the internal media with sigma Tel formatter” what we hae to do.

any time i put on my memorex is always telling me boot error,shutting down,pls tell me what to do