These instructions are for a PC using XP. If you are using a Mac or Vista, let me know and I'll give directions for those.
Click on the My Computer icon on your desk top.
Locate Control Panel and click on it.
Locate Internet Options and click on it. About midway down the box will be a section about Browsing history with a Delete and Settings button. Click the Delete button.
A box with a list of options appears. The first option is Temporary Internet Files. Click on the Delete Files button next to it and then confirm that yes, you are sure.
When complete, click the Close button and then close all the other windows that were opened.