Downloading software from unofficial sources is illegal and dangerous. If you need a modern, supported direct modeling solution, consider:
If you are a student or a hobbyist, PTC often offers a "Creo Elements/Direct Modeling Express" version. While this may not always be the full 20.1 commercial build, it provides a free-of-charge entry point into the direct modeling environment. creo elements direct modeling 20.1 download
Use a tool like 7-Zip or Windows Explorer to mount the downloaded image. Downloading software from unofficial sources is illegal and