To test this one out, I downloaded a copy of WinZip 15.5 and put it in a virtual machine.
First off, I created a few files and placed some data in them.
I then selected all three and sent them to a compressed file.
The resulting compressed file had a 70% compression on it. Not bad.
I then installed WINZIP 15.5.
I selected Legacy Compression during the WinZip installation. This matched the file extension used by Windows.
Using a Drag-Drop operation, I moved the Windows Compressed file into WinZip and it opened.
I then deleted the compressed file and used WinZip to compress the three files. WinZip got me a 73% compression. I then uninstalled WinZip to make sure it had no hand in Windows opening the file that I created with WinZip. Windows was able to open the WinZip file.