I assume you are using Internet Explorer. Click on 'tools' then 'internet options' in the 'general tab' you will see 'clear history' and also 'delete cookies' that is all there is to it. Other browsers will have similar options.
There is another way to empty temp files; Click on tools, internet options, click on advanced, scroll down to "Empty temporary internet files folder when browser is closed" and check it. This will empty the folder for you. Hope this helps. J.B.
Instead of all the faffing around there is a much easier and more thorough option. Download Ccleaner click here. It is a small, free programme which is totally safe and will clean out all files, even ones that are usually missed.
I was thinking about my original reply and I see that other people are suggesting downloading various cleaners. If you are willing to download software then my preferred route would be to download and instal the free Mozilla Firefox browser which has a delete all private data button. I have used Firefox for over a year now and recently downloaded the latest version, I would not consider going back to Internet Explorer now unless IE7 is as good as or better than Firefox, I shall wait and see!
Ccleaner is very safe to use and will delete a lot more than the 'Control Panel/Performance & Maintenance/free up space on your hard drive' method. One forum member used Ccleaner recently and it got rid of nearly 2Gb of files. It is a one click operation and should be on everyone's computer.