Yes, that big honking red error was what I got when trying to install PowerNap in a virtual machine. I devoted quite awhile to it before I decided to cut bait, as it were. The uninstall might work in safe mode, but again, I don't know what garbage might get left behind if it fails. PowerNap is REALLY old and obscure. If it were me (lately I'm answering more and more questions this way), I'd try disabling the service and if that weren't enough, I'd reinstall Windows and get it out of my life.
PowerNap puts my monitor into standby after a couple of minutes of no use but it will not wake up again. I have to unplug my monitor, wait for the power lamp to go off, then plug it back in again. Then it turns back on. How can I either uninstall PowerNap (it seems to have no uninstall process, although my Windows 10 account is an Administrator) or fix this?
PowerNap refusing to wake up monitor