Make sure if you don’t already have it you need to download and install Win32 Disk Imager. This is the software we will use to write the RetroPie image file to the SD Card. You can download the latest version of Win32 Disk Imager from here – https://sourceforge.net/projects/win32diskimager/
Next, you will need to download the latest version of Lakka from their website at – http://www.lakka.tv/get/linux/ – make sure you select the right one for the model of Raspberry Pi you have.
Once you have downloaded the Zip file it will need to be extracted to a place on your local computer. You will also need to attach a formatted SD card to your computer to which we will transfer the image.
After extracting the file and attaching an SD Card, fire up Win32 Disk Imager.
Make sure under Device that it has selected your SD Card – if not click the down arrow and select the correct drive letter for your SD card. Next, click on the blue folder icon so we can browse to the image file we just extracted.
Click on the Lakka*.img file to select it then click Open. You will then be taken back to the main Win32 Disk Imager window and you should now see the Lakka image file listed.
Now, to proceed with writing the image, click on the Write button. You should get a little popup window asking you to confirm you want to overwrite the SD card – just click Yes to continue.
If you get the following error come up then you need to format your SD card.
If you need help formatting your SD Card you can follow our tutorial here – http://raspberryretro.com/tutorials/formatting-your-sd-card/
If everything has started correctly you should see the main Win32 Disk Imager window ago with a slowly progressing green bar showing the progress of the installation.
After a couple of minutes the write should complete and you’ll be presented with with the Write Successful window – click OK to continue.
All done – Lakka has been written to your SD Card. You can close down Win32 Disk Imager and remove the SD Card from your computer and put it into your Raspberry Pi.