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I am writing codes to do web crawling in windows environment, and using google chrome and mozila firefox as browser. For google chrome I downloaded latest chromedriver and the latest geckodriver for firefox and added path of these drivers in the environment variables.
A sample code is given below which I am executing for google chrome -

from selenium import webdriver

driver = webdriver.Chrome("C:\\ChromeDriver\\chromedriver.exe")
driver.get("https://www.google.com")

In this case the web browser is opening but the google page didn't opened and the whole page remains white after staying like this for certain times the below error is coming. The image of the browser is attached.

Error:
c:\ChromeDriver>python sparrow.py
[4064:8324:1119/150817.243:ERROR:install_util.cc(691)] Failed to read HKLM\SOFTWARE\Policies\Google\Chrome\MachineLevelUserCloudPolicyEnrollmentToken: The system cannot find the file specified. (0x2)

DevTools listening on ws://127.0.0.1:50164/devtools/browser/f68ff514-1e83-403b-b8a3-61adfc50b15d
Traceback (most recent call last):
  File "sparrow.py", line 3, in <module>
    driver = webdriver.Chrome("C:\\ChromeDriver\\chromedriver.exe")
  File "C:\Users\CSURV5\AppData\Local\Programs\Python\Python37-32\lib\site-packages\selenium\webdriver\chrome\webdriver.py", line 81, in __init__
    desired_capabilities=desired_capabilities)
  File "C:\Users\CSURV5\AppData\Local\Programs\Python\Python37-32\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 157, in __init__
    self.start_session(capabilities, browser_profile)
  File "C:\Users\CSURV5\AppData\Local\Programs\Python\Python37-32\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 252, in start_session
    response = self.execute(Command.NEW_SESSION, parameters)
  File "C:\Users\CSURV5\AppData\Local\Programs\Python\Python37-32\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 321, in execute
    self.error_handler.check_response(response)
  File "C:\Users\CSURV5\AppData\Local\Programs\Python\Python37-32\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 242, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.WebDriverException: Message: chrome not reachable
  (Driver info: chromedriver=2.43.600210 (68dcf5eebde37173d4027fa8635e332711d2874a),platform=Windows NT 10.0.17134 x86_64)

The below code is for the firefox -

from selenium import webdriver

driver = webdriver.Firefox("C:\\ChromeDriver\\")
driver.get("https://www.google.com")

I am not getting any output after executing the code, even the browser is not also opening. After some time this error message has been thrown.

Error:
Traceback (most recent call last):
  File "sparrow.py", line 3, in <module>
    driver = webdriver.Firefox("C:\\ChromeDriver\\")
  File "C:\Users\CSURV5\AppData\Local\Programs\Python\Python37-32\lib\site-packages\selenium\webdriver\firefox\webdriver.py", line 164, in __init__
    self.service.start()
  File "C:\Users\CSURV5\AppData\Local\Programs\Python\Python37-32\lib\site-packages\selenium\webdriver\common\service.py", line 104, in start
    raise WebDriverException("Can not connect to the Service %s" % self.path)
selenium.common.exceptions.WebDriverException: Message: Can not connect to the Service geckodriver

Please let me know the exact reason, why I am getting these error?

see: https://python-forum.io/Thread-Web-scraping-part-2

Quote:driver = webdriver.Chrome("C:\\ChromeDriver\\chromedriver.exe")

what is the permissions of C:\ChromeDirver?

Quote:

driver = webdriver.Firefox("C:\\ChromeDriver\\")

As for firefox it appears you are just passing the same directory to it. Where is geckodriver?

(Nov-19-2018, 12:23 PM)metulburr Wrote: [ -> ]

Quote:what is the permissions of C:\ChromeDirver?

The directory ChromeDriver has full permission.

Quote:As for firefox it appears you are just passing the same directory to it. Where is geckodriver?

geckodriver and chromedriver is in the same directory C:\ChromeDriver

(Nov-19-2018, 10:57 AM)sumandas89 Wrote: [ -> ]Failed to read HKLM\SOFTWARE\Policies\Google\Chrome\MachineLevelUserCloudPolicyEnrollmentToken:

It complains that you don't have this key is register.
I check i don't have this key,but work fine without for me.
Try add key to register follow this.

Also basic stuff if you make a folder ChromeDriver with chrome and gecko driver in it,you will need to add that path(C:\ChromeDriver) to Windows Path(Restart Pc).
How to Edit/Add Your System PATH