Hi, qwertymn, and welcome to Piriform.
As stated in the CCleaner guide:
QUOTE
If an application is simply listed in the Applications, Internet, Multimedia, Utilities, or Windows sections with no details, the cleaning process will typically clear out document history (MRUs), visited URLs, and temporary files for that application.
http://docs.piriform.com/ccleaner/ccleaner...pplications-tabAll perfectly safe to clean, as long as you don't need to retain any of those features, or keep important documents in temp files, as some people do to their cost sadly.