I’ve been trying to add cores using the online updater but no systems show up? I’m not newbee in the emulation scene but now I’m very confused!!! why cores are not shown on my pc? maybe having them all already pre installed or on download the from the site on a zip file would be best for a newbee like me.
Thanks for reading this
If you mean the cores list is not loading when you press online updater try to allow Retroarch in your firewall! It happened to me before 
Nothing is happening what buttons I need to press? firewall is not giving any warnings.
The default mapping for Accept/Cancel are X and Z, respectively.
If you just want all of them, you can go here: http://buildbot.libretro.com/nightly/ navigate to the platform and architecture of your choice, hover your mouse over the ‘latest’ folder and a checkmark will appear in the corner over it. Click on that and then click the ‘download’ button (an arrow pointing down with a line under it) that appears in the upper left of the browser window. This will give you all of the latest cores in a zip archive that you can unzip into your cores directory.
The x button worked to activate… I was using enter, I did it this way because I was not able to download all core at the same time from the website folder!!! if I mad a mistake I had to start re-checking all cores again.
Thanks for the help I will continue coming back here for help as I’m a newbee in this new type of emulation style.
Thanks again