why should we perform disk cleanup?

Answer 1

eliminates unneeded files that slow your computer down

and when a computer 'puts' files back after you use them - it can throw them anywhere - so you need to disc defrag every month or so -

and error check every month to clean up any bad sectors

Answer 2

u shd coz the temporary files that are not needed slow down ur PC. Moreover secured sites often say that session expired and ask to clear the temporary files as there are security problem with the cookies. So disk cleanup shd be done once in a week .

Answer 3

Basic PC Maintenance.. Just do it.. :D