Reformatting your hard drive in this situation won't do any more than clearing cache/cookies/etc.
Click the link in the bottom right hand corner that says "Go to Google.com".
If you have a Google Account, you could try doing this:
- Go to
http://www.google.com/accounts/ (Sign in if you aren't already)
- Then click on "edit"
- Check what country it says you are in, and change if it is wrong