Install on fresh sd card

What is the problem?
Need to reinstall on my pi. Downloaded latest version. Unzipped to a new folder.
When I try to opem the disk image file it gives an error of "the disk image file is corrupted"
Tryed older versions all do the same.
I can download raspbian. Ok

What did you already try to solve it?

Additional information about your setup (OctoPrint version, OctoPi version, printer, firmware, octoprint.log, serial.log or output on terminal tab, ...)

Hello @Alistair_Mann!

Please keep to the steps Setting up OctoPi in this manual: - Download & Setup OctoPrint
That should work. Windows can not read other formats that its own. Do not react to Window's complains