A defective cd drive software: LCD defective (dead) pixels tester, New Pigment: End Colorblindness for Good!, Check for dead or defective pixels on LCDs and more.
Purge allows you to reclaim drive space quickly, by getting rid of space-wasting "garbage". Purge can remove *.bak,*.tmp files and zero-byte files. It can delete defective links, empty the tmp. directory and erase old browser-cache files. There is a variety of security options: it will give you a prompt so you can choose which files to delete; it can store all marked files in a special backup directory before deleting them.
Play a trick on your friends/acquaintances! Simply secretly install this harmless joke program on your victims computer. When your victim starts and uses Windows, one of his/her CD/DVD drives will continue to open in irregular intervals.