CCleaner settings

I have a question that I did not see explained in FAQS. There is a box to check for desktop icons. My question is what happens if I check this box? Does it wipe off all my desktop icons or clean them somehow? Obviously it does not make sense to wipe of all icons at once, but I do not want to take a chance. I upgraded Java today and now seem to have corrupted desktop icons. On top of the icons appears to be a piece of paper with screen with three colored items. It is too small to read. I tried to refresh the icons but no change.

Windows Vista Home Premium

It will check for invalid desktop shortcuts (have no target) and the it will do the same for start menu shortcuts too.