When tightvnc is installed and then uninstalled, a leftover commandline remains in HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run (and presumably in its WOW6432Node 32-bit counterpart): 'tvncontrol' 'REG_SZ' '"C:\Program Files\tightvnc\tvnserver.exe" -controlservice -slave'. The OS will then attempt to run this nonexistent executable on every startup, and the entry will permanently add to the clutter of uncleanly uninstalled software.
I've observed this behavior since at least 2017 and it's still present in the latest release. Tested on a clean win11 vm. The Run registry entry is created when 'Register TightVNC Server as a system service' is checked during installation, which is the default.
Hi!
Going to fix in the next release.