fireonthewater

Okay I have a question about CCleaner and I can't find an adequate place to post it, so here goes. Sorry if it's in the wrong spot. When I run CCleaner on my home laptop, why are a majority of the files (like 90%) to be deleted come from MIcrosoft Explorer, when I do not even use that program as my web browser? I just find this odd and wonder if it's normal. Thanks for your help...........