I'm trying to do a clean install of Magento 2 with sample data. But the installer keeps hanging. I refresh the page, start the installer again, but normally just hangs at another point But this time it just hangs at 67%. I've tried to install Magento 2 about 10 times now and each time it doesn't install correctly.
Also in php.ini I changed max_execution_time to 500, memory_limit to 2048M, post_max_size to 2048M, upload_max_filesize to 2048M and max_file_uploads to 2048.
Update: I tried restarting IIS and then this happened: http://imgur.com/LCmxRa9
Update: I give up: http://imgur.com/a/IP6bb
Having the same problem, but as you have not had an any responses, I guess I will just give up as well.
Can you not check the IIS logs to see if there was a problem. This is usually caused by a timeout error (504). Also I wouldn't recommend using IIS, please use Apache or Nginx, you can do this with WAMP or MAMP. More ideally though use Virtual Box and setup a proper LAMP or LEMP stack, guides for this can be found around the web.