Here is a run down to accomplish what you are trying to do. I added screen shots to help you along with backing up and restoring your database. The file paths won't exactly be the same.
Backup the database Registered
Click on OK
The database has been backed up
To restore the database registered, right click on the Registered Database in SSMS and choose Restore Database
In the window that appears, select From Device and click on the button with three ... to search for your backup
From here, click on Add and locate your backup file
Now click on OK
Click on OK
You are now back in the Restore Database Window, select Options
Make sure to select Overwrite the existing database (WITH REPLACE) and Leave the database ready to use option in the Recovery State options.
Then Click on General in the Select a page zone
Click on the checkbox "Restore" and then click on Script. I prefer sending the restore command to a new windows as a Script instead of directly clicking on OK. This way, I can drop any active connections to the database before restore which could result in a database in use error.
A new query window will be opened with the code necessary to restore the Registered database.
Add the following code just above the restore database script
-- drop all connections and put database in restricted user mode
ALTER DATABASE [Registered] SET RESTRICTED_USER WITH ROLLBACK IMMEDIATE
-- restore database
RESTORE DATABASE [Registered]
FROM DISK = N'D:\Program Files\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL\Backup\Registered.bak'
WITH FILE = 1, NOUNLOAD, STATS = 1
You will notice that I modified the STATS option from STATS=10 STATS=1. This can be useful when restoring large databases. In the Messages tab, you can view the progression of the restore by %. With STATS=1, the restore can be monitored 1% at a time instead of every 10%
Now hit F5, to run the script.
Nonqualified transactions are being rolled back. Estimated rollback completion: 100%.
13 percent processed.
23 percent processed.
32 percent processed.
41 percent processed.
50 percent processed.
60 percent processed.
73 percent processed.
83 percent processed.
92 percent processed.
100 percent processed.
Processed 168 pages for database 'Registered', file 'Registered' on file 1.
Processed 5 pages for database 'Registered', file 'Registered_log' on file 1.
RESTORE DATABASE successfully processed 173 pages in 0.076 seconds (17.783 MB/sec).