Windows X's Live recommends:
Before and after making any changes to your system: Check Windows for registry errors.
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Do you know when you type your documents, open compression files from internet or run some applications. It’ll make temporary files but sometimes it doesn’t delete them after finishing your work. Those junk files will remain in your harddisk and eating up your space. Auto Cleaner XP will clean up these junk files on Windows startup.

Features

-Easy to use
-Auto cleanup files on Windows startup
-Fast clean (doesn’t find and delete files but delete in specified path)
-Small size
-Clean up temporary folder
-Clean up some temporary internet files extension that won’t be used for visiting websites
-Clean up application logs
-Clean up Netscape cache
-Clean up History, Recent Documents
-Clean up text cookies
-Auto set startup when you run this file and do not change filename

Download

You can obtain Auto Cleaner XP from Auto Cleaner XP's download page