I am having trouble using Selenium Chromedriver on Windows 7. To display the problem, I've boiled it down to a simple script to simply launch the New York Times website:
from selenium import webdriver
# --LOCATIONS --
# The Chrome app:
# C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
# The Chrome binary:
chromedriver_path = "C:\Python27\Scripts\chromedriver.exe"
driver = webdriver.Chrome(executable_path=chromedriver_path)
I'd have to see your computer to examine how Chromedriver is installed, but as that's not quite feasible, I would at least recommend uninstalling any chromedriver executables on your computer and then downloading it into your project's directory.
It's really just an IT rule-of-thumb; if you've ruled out every other issue that you're aware of, then there's a good chance the problem is something you're not recognizing. Start at square 1 and reinstall Chromedriver.