text: Firstly 256MB is not nearly enough RAM for windows XP, i suggest that you go buy another 512MB Stick of RAM (its pretty cheap these days) and you will see a difference in the speed of your system also temporary files are as the name suggests files that are temporary these files are created when you install software extract things from compressed folders and download things from the internet. Temporary files are able to be deleted whenever with no ill effect to your computer. To do this goto Start -> All Program -> Accessories -> System Tools and click on disk clean up. This will scan your hard drive for temp files and will allow you to remove them and recovering some disk space. Everything in disk cleanup can be removed with out affect you system and how it runs