I notice sometimes that Windows does not delete all the files in my recycle bin because when I use a program called tree size  to see which folders take up the most space on my drive. It says my recycle bin has files in it, but when I open my recycle bin in Windows Explorer, it is empty. However, when I boot to Ubuntu 9.04 Live CD ,and open the $Recycle.Bin folder in C:\$Recycle.bin\ . It has folders in it with weird names like S-1-5-21-… that contains files in the folders, so I just delete the files and folder in $Recycle.Bin to get back valuable disk space by deleting unwanted files, and freeing space. The recyle bin is caller RECYCLER in XP and $Recycle.bin in vista.
Learn how to delete files from Windows recycle bin by clicking the link below.
Tutorial
1. Download Ubuntu Desktop edition from  http://www.ubuntu.com/getubuntu/download .
2. Burn the .ISO file on to a CD. Learn how to do it here : http://johnson-yip.com/burnubuntucd .
3. Place the newly burned CD in your CD-ROM drive, and restart your computer. You may need to go into the BIOS/CMOS setup program to setup your computer to start from the CD.
4. Pick your Language you read and write with.
- Language
5. Pick “Try Ubuntu without any changes to your computer” from the list of options.
Try Ubuntu without any changes to your computer
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3. Wait for Ubuntu to load. It may take a few Minutes. Go to Places menu on the top and click on your drive on the menu.
- accessing hard drive
4. A window will pop up with a list of all your files on your drive. You can copy, cut, paste, delete, rename files like Windows Explorer. Find the folder named and open $Recycle.bin. Don’t delete $Recycle.bin. Only delete the files inside of $Recycle.bin
3. You can either delete all the folders, or go into the individual folders and delete what you need to delete, and leave the rest of the file in the recycle bin alone. Pick Move to Trash by right clicking the files or folders.
 4. Click Delete all or delete when the option pop ups.
 Now your recycle bin should be empty when you log in to Windows, and you should see that you have some free space back when you go to my computer and right click properties on the drive. The Recycle Bin icon should be empty on your desktop if you deleted all the files.