Like said in the intallation page
in the manual at step 10, you have to enter a strong password with at least one capital letter and one number, so Passw0rd
should do the job. When you are logged in to windows you can disable this enforment via this
The only mistake you can make during the installation is selecting a Server Core Installation
in stead of a Full Installation
, but I guess this doesn't affect the creation of a new password at the first start.
Good luck! Hope you can log in now!