Well the instructions you quoted say Blockchain and Newer drivers. Win 7 probably want to go to win 10. Current version lolminer 1.16.
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Which ones are they? I don't understand which ones it refers to. Do you have a link to download?
You quoted the instructions for lol....in your message.....
So got to AMD site and download newest driver for Polaris cards (your RX 480 are polaris cards)
The scroll up through thread and see link from lol for 1.16....
It is literally 5 posts before this one....
https://github.com/Lolliedieb/lolMiner-releases/releases/tag/1.16