How to remove SP2 downloaded files after an aborted install?

I downloaded SP2  on a Latitude CPi laptop with 1.3 gbytes of free disk space, in the middle of the

install a message said "not enough free C: diskspace".  I aborted the install but the downloaded

components are taking up over 500 megabytes of my C: drive.

How do I remove everything that was downloaded  to get back to my original free space???