Glad you asked...
You may want to reconsider deleting them. They are the good files on your computer and part of the Operating System. If you need more room for memory try a defrag or a disk clean up. See this site for more information http://www.theeldergeek.com/disk_defragm...
Then again, this answer might help you...
Contiguous enables files and programs to load faster. When you defrag your computer you are moving all the scatter pieces of similar data and storing it together. The following is an analogy to help you understand better: When you read a magazine, sometimes the entire story is one one page (contiguous) and there are time when the article is continued several pages over (fragmented files). You can read the story faster if it is on one page rather than flipping through the magazine to find the rest of the article. The computer does the same with data. If like data is store in the same block, then accessing the data is faster than if it is stored in several blocks. If you are concerned about space, perform disk clean-up and defrag.

