Take help of the long path tools to delete some files
There may be files in your computer that enjoy immunity from the Delete button. You cannot delete them no matter how many times you hit the delete button. Close the folder which contains the file, close the file and try to delete it, but it will not get deleted. The same error message - Cannot delete file or folder. The file name you specified is not valid or too long. Specify a different file name will stare in your face every time you try to delete files. These files occupy a lot of space on your disk too. So it is pertinent to delete such files.
You will be tempted to try methods like using del*.lnk, shift + del etc, but it will simply refuse to get deleted. This is because the problem is due to the long address path of the file.
Your system cannot recognize files with more than 255 characters in its address path. This is called path too long error.
The best tool available to fix this error and can delete files with more than 255 characters is the long path tool. However, there has to be less than 32000 characters, the internal limit of windows. Simply download and install the tool and resolve the issue.
Download Long Path Tool 5.1.6 here