I am using windows 8.1 and had a blank initial page on kibana (could see navigation menu but not page) after installation. I made sure that the properties of the kibana root folder were not set to read-only in the properties and made sure that the IIS user account had access on the web.config.
Probably worth check IIS user security on other folders too (I did a full control on the whole kibana folder just cos I'm testing it out for now, but that's definitely not a recommended fix for any development projects and certainly not for production!)