problem in installation of python 3.9.0

[Priyankgasree K]

Hello,
        I am Priyankgasree, i am facing problem in installing python3.9.0.
after i finish download it always says you have to repair or uninstall. I
have repaired and uninstalled and reinstalled several times but i can't do
anything . And also I cant able to download other versions of python. So
tell me what`s the problem and the solution