The tutor shares an answer to not being able to copy and paste files in Windows Explorer.

To my knowledge, I can no longer (reliably) copy and paste files in Windows Explorer on either of my Windows 7 computers. Therefore, I can’t move files the way I’ve come to count on. What to do?

I’ve looked into fixing the problem, but it looks potentially more destructive than constructive.

For now, I’ve chosen a workaround: the old DOS copy command. It can be used at the Command Prompt, available from the Windows Start menu. Assuming you’re in the directory of the file you want to copy, a typical command might look like so:

copy this_file c:\that_dir\that_sub_dir

Two hints:

1. Very often one wants to move a file from Desktop, My Documents, Downloads, or some common place like that. Those directories can perhaps be found under C:\Users\your_user_name.
2. The Command Prompt uses backslashes in directory names.

Source:

technet.microsoft.com

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.