is sshd running on the raspberry pi process list? It suggests that it does not have one up and running or the machine is not reachable.
does ping work? if not try adding a dot at end of machine name.
if you have telnet you can verify the port is running and accessible from windows with ..
[pete.win10] ➤ telnet raspberryip 22
Trying 192.168.1.114...
Connected to ras.
Escape character is '^]'.
SSH-2.0-OpenSSH_7.4p1 Raspbian-10+deb9u1
if you cant find telnet try download MobaXTerm. its fantastic :-)
if it stopped running after reboot its possible its only running but not enabled. in this case try
systemctl enable ssh
then reboot to make sure it stays active