A faulty IP address, an inaccessible proxy and Internet service provider failures are three reasons that may cause Google to not load. You can usually fix the first two reasons on your own.
Every device connecting to the Internet has an Internet Protocol address. When your network settings do not recognize your IP address, you can't connect to the Internet. To reset your IP, click the Start button on the bottom left, type "cmd" into the search box, and click Command Prompt when it shows up. Once the Command Prompt launches, type "ipconfig/release & ipconfig/renew", press Enter, and wait for Windows to reconfigure your IP address.
If you connect to the Internet through a remote proxy, it is possible that the proxy server is down. If this is the case, you must disable the proxy settings. The process is different for every browser.
To disable proxy servers in Google Chrome, click the Chrome Menu button on the tool bar, and select Settings from the list. Click Show Advanced Settings, and then click Change Proxy Settings under Network. When the Internet Options window opens, click LAN Settings and disable the proxy. If using Internet Explorer, click Tools on the toolbar at the top, choose Internet Options, and then follow the exact same steps as those for Google Chrome.
If using Mozilla Firefox, click Tools on the toolbar at the top, choose Options from the menu, and click Advanced. Navigate to the Network tab, and click Settings. Select No Proxy from the options, and click OK. Depending on the Firefox version, you may need to press the Alt key to reveal the toolbar.
Alternatively, it is possible that there is a problem with your Internet service provider. If you're still unable to connect to Google, call your ISP.