Quickly remove temporary files and more
CCleaner is a geat free software program that has been around for a while. It makes it easy for you to remove unused files from your system, which allows your computer to run faster by freeing up valuable hard disk space. It also cleans traces of your online activities such as your Internet history, allows you to manage the programs that start-up and also includes a handy registry cleaner function. For the advanced user it can do a lot more as well.
CCleaner does the same as the built-in Windows disk cleanup utility, but does the job much faster and also includes a lot more functionality.
I personally have been using this program since I first purchased my other XP computer and have had no issues at all.
http://www.topfreeware.net/favprograms/cleaners/cleaners.htm
Heres another tip which can help you with your desktop email program: Email: Turn off automatically mark as read feature