Render stuck on cancelling - Windows memory problem

Please help me. This render was going on for almost 18 hours, now that I pressed Esc I got a Windows message saying “computer is running out of memory”. I pressed OK and now I’m looking at Blender hoping for possibility to save this render file but the interface isn’t active, I can move around the image but nothing more. Any ideas how to save this image? I can’t attach a scrrenshot because web browsers won’t start, uploading a screen photo from phone fails.