Editing Windows Registry can be sometime dangerous. Because registry keeps record and configuration settings of windows disturbing one entry may prevent windows even from booting. So for non techie persons editing or For own’s backup purpose backuping up registry is important.
Click Start-> RUN
In the Registry Editor if My Computer is not selected then first select it right click and Expor, it will request you for a name,give a name then save. It may take some time.
If you want to restore the registry at some time later you can click on the File -> Import and then open the file