Hidden Internet Browser in XP:-

Ever been on PC where Internet Explorer was blocked? One solution would be to use a portable version of Firefox on a USB drive, or you can access a hidden browser in Microsoft HTML Help program if removable media is not an option. This was tested on Windows XP SP2 with Internet Explorer 6 and Internet Explorer 7.

Open calculator. You can do this quickly with Windows button+R on your keyboard, type calc in the run box, click OK.
In Microsoft Calculator go to Help -> Help Topics.
Now right click on the left hand side of the title bar and click on Jump To URL...
Type in the URL including the ‘http://’
and off you go. Repeat to visit other sites.