I'm trying to make a backup from my iPhone, however it's set to be password protected.
I do not know the password, as I've never set one. I've tried all the passwords I know, which I've ever used to make sure I didn't set it.

I've also tried the default `0000` and `1234` codes. 

I want to uncheck the encryption checkbox in iTunes, but it requires me to type a password.
What else can I try?

I have no problems in removing all backups and start from the scratch somehow, however - I do not want to restore my phone as new and remove all those settings.