JimmyJohn

Has your computer slowed?  Often the tools that show where these things are
are confusing and worrying to the novice user.

They are in the right place if you want to detect and repair the office apps
or be sure of a quality un-install if this should be necessary.

Do they have to be there?  No, but they will do little harm either providing
you still have plenty of disk space and sometimes trying to find the CD when
you're in a hurry, can be a pain.

Up to you