This sounds more like a Raspi or OS issue and the Pi-hole installer triggering the Putty disconnect.
You could also inspect the systemd journal:
Have you tried another power adapter and cable?
Raspi's can crash or even corrupt storage (SD card etc) if the power isnt sufficient.
See also below:
https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#power-supply-warnings
You could also check the systemd journals for errors/warnings etc for the current --boot:
sudo journalctl --full --no-hostname --catalog --priority warning --boot
Or two boots back (-2):
sudo journalctl --full --no-hostname --catalog --priority warnin…
1 Like