Android Studio / Android Emulator - Decryption Unsuccessful

I just installed Android Studio and I am very new to this program.

So when I launch the Android emulator, it says, "To start Android, enter your password," even though I never set a password. When I just enter a word with 4 letters, it says, "The password you entered is correct, but unfortunately your data is corrupted."

After that I have to Reset the Phone, but when I do, the same menu appears as "Start Android, enter your password".

It might just be a slight mistake, but as I said, I'm new to this. I've also done some research on the internet, but I haven't found anything useful.

I would be very glad if someone had an answer to this