IvyCom UK Advice on Computers

Internet Explorer 7

The latest from Micro$oft is excellent - it includes several additional security features, you get more 'viewing area' and it's free.

At nearly 15Mb it's a lumpy download if you're not on broadband, so get someone else to download it for you on to e.g. a memory stick and you can go from there.

Mozilla

This is one of several widely used Netscape based browsers.  Many people swear by it and it has some good features.  However, I've always had computer problems when I have had it loaded which have gone away when I have taken it off.  I can't positively link the two so you'll have to make your own choice.