I am running an outdated Windows 7 and am not able to update it due to some reasons. I wanted to know how vulnerable is my Windows to WannaCry from the home wifi network connection. What would you recommend as an alternative solution to keep my Windows protected from it?
WannaCry spreads using windows SMB. One should be able to disable this completely. However i recommend you to update your system. You wont win the hacking race against thousands of people alone...
Block external access to the smb port at the router (139, 445).
Disable smb if not necessary
The usual anti- spam stuff
the usual mail/browser hardening