Assuming you are using Internet Explorer, lets try to reset your settings.
1. Open Internet Explorer and click on Tools
2. Click on Internet Options
3. On the General Tab, Click delete in the Browsing History section.
4. A window will pop up, Delete the top 3 items only (Temporary Internet Files, Cookies, and History) and click close.
5. Now go to the Advanced Tab and click the Reset button at the bottom
6. Click Reset again to confirm.
7. Once finished, close Internet Explorer and re-open.
8. Go back to Tools>Internet Options
9. Select the Content tab, and click "Clear SSL State" under the certificates section.
10. Now go back to the advance tab and click on Restore Advanced Settings.
11. Click OK and close Internet Explorer.
Once finished, check and see if that has solved your problem or not. If not, please post back and I will further assist you.
To help determine if this is a browser problem or not, does your internet explorer google search work?
If you would try it and let me know the results, it will help in diagnosing the problem.
You may have a virus that is blocking it. Lets try to run Combofix and see if it fixes the problem for you.
You can download it from here and the instructions are on there as well. Once on the page, look under the section that says "Using ComboFix" and there are 2 links to download it.
Download the program and save it to your desktop.
**Please, close out any programs/antivirus before running the program **
When it asks to install the recovery console, you can choose yes or no. This is an option component and is something that doesn't have to be installed.
Combo fix may need to reboot your computer.
After ComboFix has been ran, you can post the report back to me and I will look through it.
Also, you may want to try pinging google. This could be a dns or host file issue.
(xp) click run, (vista/7) in start search box
type in cmd
You will see a black command line window open, type in
and let me know if it times out or if you get a reply.