Norton's suite could have replaced the firewall. I can't know your choices on that.
Sorry if this shows up in two different posts. I can't find my original post. i get an error message [due to unidentified problem, windows cannot display windows firewall settings] this also came at the same time as inability to copy and paste to notepad or drag and drop between folders. upon a recent reboot the norton asked if i wanted to turn off the windows firewall. i had not seen this error until 2 days ago. norton recently found a driver.exe file to be a threat and killed the bug. may be a coincidence of timing.