Registry questions

Just downloaded Ccleaner. I analyzed the Registry and chose fix.... I did not backup since it appeared to me that leaving anything was not necessary. Now I am concerned that I did this too hastily and am "afraid" to turn off my computer for fear of not being able to turn it on.

Did I goof?

Yes. Fortunately I've never had to restore the registry. You're probably ok, but in the future always backup. So cross your fingers, take a deep breath and reboot.

EDIT: I'd like to see backup ✔ by default.

EDIT: I'd like to see backup ✔ by default.

As suggested by dennis the backup should be automactic with out user choice.