I'm having the same issue as you.
I've tired ping the machine and it response, but I can't access the file explore (name or IP address), nor can I SSH into it either (using PuTTY) I've tried everything but use a new USB stick because I don't really have anymore or one's that are more reliable then the one in the machine (USB 2.0 and on a new USB 2.0 port as well) no matter what I do I get "tower refused connection"
I'm pulling my hair out here, like OP any help would be great, and much much appreciated!