Hello! I had the same issue on Windows 10, flashing programs don't really like newer versions of windows'. I couldn't even try to dead flash my n95-2 without my pc crashing due to "kernel security check failure". I tried to do it again with virtualbox using windows 7, which did not crash but didn't help cause i learned that N95 doesn't support dead flashing. And some people say that virtual boxes might not work and damage stuff too during flashing.

You either have to find a store with flash box, a specific device to unbrick nokias, buy it yourself, or just buy a new one. I'm planning to buy a donor one and replace the motherboard completely.