What is the extent of autorun at bootup?

Hi, I'm a CCleaner newbie... My question is: when I select autorun at Windows bootup, does the app run my set the registry "issues" function as well as the "cleaner" options, or just the later? I'm guessing it only runs the "cleaner" options. I'm just a bit worried it could be editing my registry without the otherwise automatic backup prompt.

Thanks

David

Your guessing is right. It will just run the Cleaner Options.