When you are trying to install SQL server on your computer and because of any other installation or any process some files are pending for renaming hence this happened.

Steps to solve this problem
- Open the run window
- Type regedit to open registry editor.
- Search for following value in registry.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\PendingFileRenameOperations
- Double click the PendingFIleRenameOperations and once you will double click it a dialog window would be appeared and simply press the delete key and click OK
Now you would be able to install your SQL server. Please leave your comments if this post helps you.