Yes.After Spybot is installed,you can go back and try to make another registry backup.
Try opening Spybot,click mode,then Advanced Mode,click Settings over to the left,then click Settings below that.At the top of the page,you should see the Wizard button.If you click that,the wizard should open,and you can try backing up your registry once again.If you'd already immunized and updated,if the steps come up in the wizard again,you could keep pressing the Next button until you get to the end,and then you can press the Start using the program button to get rid of the wizard.