To install the OS on the RPI you will need to do the following steps

1. Format the SDCARD

Do this with the feature included in Windows or ask me to do it using the Formatter 4.0 tool.

https://www.sdcard.org/downloads/formatter_4/

2. NOOBS

Download the file to the desktop, extract it and drag the content to the SDCARD.

3. ISO image

If you download an ISO image use the UNetbootin tool and select the radio button Diskimage to pick the downloaded ISO file.

https://unetbootin.github.io/