Can one of you clever techy types help with this please? I'm trying to sign in to you tube and have never had a problem. I signed in to it two days ago. It's asking for my phone number, which it usually does. I enter my number then receive a number back to enter, then I'm in. Now it's saying it doesn't recognize my phone number, so I enter my email address, which it accepts, but it then asks me to "Confirm Screen Lock". What does that mean? I enter my password, but that doesn't work. It recognized my phone number two days ago, but now it says it's invalid. Any ideas anyone? TIA.