Files on Desktop are not accessible
This might be helpful if you give a try:


Add your username in the Name column


Select the Desktop folder from Finder and Press cmd+I. 
Click the lock icon   to unlock it.
Enter an administrator name and password
In the Sharing &amp; Permissions section, do the following:

a. Click the Add button + below the list, select your username then click select. 

b. Select your name in the Name column, click the Action pop-up menu , then choose “Make __ the owner.”

c. Also, click Apply to enclosed items... ()