Nested if-statement not working properly (python) [closed]

Here's my code:

#Greeting
print('\n---Automatic Troubleshooter---\n')

#UserInput
userInput = input('Are you having issues with your Wi-Fi?: ')

#QuestionAnswer
if (userInput == 'Yes' or userInput == 'yes'):
    print('\nReboot the computer and try to connect.')
    userInput = input('Did that fix the problem?: ')
    if (userInput == 'No' or userInput == 'no'):
        print('\nReboot the router and try to connect.')
        userInput = input('Did that fix the problem?: ')
        if (userInput == 'No' or userInput == 'no'):
            print('\nMake sure the cables between the router & modem are plugged in firmly.')
            userInput = input('Did that fix the problem?: ')
            if (userInput == 'No' or userInput == 'no'):
                print('\nMove the router to a new location and try to connect.')
                userInput == input('Did that fix the problem?: ')
                if (userInput == 'No' or userInput == 'no'):
                    print('\nGet a new router.')
                else:
                    print('\nExiting program...\n')
else:
    print('\nExiting program...\n')

Whenever I get to the last if statement, regardless of what I input, it always prints 'Get a new router'. At first, I didn't have the first else and the last else; I just had the 'Exiting program...' outside, and in my mind, it should've worked. If the problem is fixed, it shouldn't continue with the rest and print 'Exiting program...' Also, when I change the condition it works. So when I change the last if statement's condition from 'No' and 'no' to something else, it works.