Try out this Ubuntu 20.04 Focal which has a custom Windows 7 theme. Go to the following link to download the iso https://drive.google.com/file/d/1j3quDvWp7TU64cbfPYCBCWmR-ugLHlwu/view?usp=sharing
Do not forget to check the integrity of the downloaded iso. Refer to windows-7-linux_ubuntu-10-final.txt for the sum check
Enjoy