If you have no access at all to google, it could mean that your computer administrator has blocked the google website. Another reason would be that, you may be experiencing some technical difficulties with your internet connections speed.
If you are having connection errors with the Google website, this could mean that your Internet connection speed is too slow. Please contact your Internet service provider for information on your connection.
If you are unable to access google, it could be that your administrator has blocked or removed permission to access the website. Otherwise you could be having a technical difficulty with your internet connection.