i try copying file from my system to my hard dics and flash driver it keep saying invalid MS-DOS function and that i should write a report on the code.

how can i write and to whom i am going to write it to?

Bulus Jonathan Bayaro, ,

What is the EXACT error message?

Where is the file that you're trying to copy?

What operating system are you using?

Perhaps you should do it in front of a friend and see if they can spot what the problem is.

Paul Zucker