How to delete in Windows a file or a folder with too long filename

-Write "CMD" For open a command prompt.
-Find file or folder with use some dos command 

-From a command prompt:

dir /X

U see dos name of file or folder with this command.

This will list your files/folders in short name format. Then use the short name exactly as written to delete the file:

del LONGF~1.doc

For folder:

rd LONGF~1