Restore PC to factory settings and restore selectively from Ghost back up

Hello,

 

my PC is running slowly, and to improve things I want to restore it to the original factory settings. This will be simpler and quicker I believe than trying to clean it up manually using a registry cleaner software and the like.

 

I have made a complete backup of my system using Norton Ghost. If I restore my PC to the original factory settings will it be possible to selectively restore program files and folders from the backup? Will it be necessary to reinstall Norton Ghost before restoring any programs or files?

 

I would be most grateful for any help or advice that anyone can provide.

 

Thank You.