The search bar in the top right hand side of my screen works fine, but the main search bar in the middle of the home screen doesn't at all; do you know how I can fix this?

Question

I can access bookmarked pages, pages that are on a saved RSS feed, and can search the web using the top right-hand bar on my screen. However, the main bar, in the center of the home page (not sure of the correct name) will not do anything - whether I press search, or hit enter on my keyboard. There also appears to be another bar underneath that, which I can press, but it remains useless.
My Dad is running Firefox 4 on his computer, and has showed me what it is meant to look like. I can therefore conclude that there is definitely something up with mine.
I am currently using Firefox 4 with my laptop, which runs Windows 7.
I have uninstalled and reinstalled Firefox 4, but the problem still remains. I am not keen to use Internet Explorer, purely because I have bookmarked so many pages on the previous version of Firefox but also because I get on very well with the whole layout etc.
If it comes to it, I am willing to take the risk of losing my bookmarks, but if there are any suggestions at '''''all''''' of how I could possibly fix this problem, I would welcome them.

Answer 1

Go to this address: http://mycroft.mozdev.org/search-engines.html?country=AU
Item 24 lists 3 installable major search engines for Australia.
You can also restrict your search in Google by including ''country:au'' or ''location:au'' or ''city:perth'' (for example) in your search terms. Example: ''city:sydney plumbers'' in the Google search box will list plumbers in cities named sydney.