You have identified a file name or folder that is over 260 characters, any windows OS /file system will not be able to read this, it will display it BUT you cannot modify it. You could truncate the long filename with a util or do the following.
The fix is quite simple.
Drop to a command prompt and go to the directory that the file is in.
say the file is called” this is a really long file and i cannot delete it as it is over 260 characters etc etc”
Then simply enter Del “this is a ” *.*
As the file is in speech marks and your using the Wildcard (*) it will delete the file.
If you find a directory the is over 260 characters then use the command..
RMDIR “this is a really long folder”*.*
For sub folders that are full use RMDIR /s “this is a really long folder”*.*