Man I am sorry but I am not a computer guy, but I think this is wait you asked. The windows explorer part I'm a little unsure of. Anyway if you get feed up with me that's ok and it wasn't
a big investment.
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No problem, I want to help. It looks like for whatever reason, the service was installed on a temporary location, and has since been deleted. Can you try installing it again by running the setup.exe, maybe as administrator, and if it asks where to install it, can you pick something like C:\FSService? Thanks.