Google chrome

How to shut down Google chrome when I am done using it? When I start ccleaner it comes up are you sure you want to delete these files and I check the box don't show again. Then another part comes up and said Google chrome won't close and I need to force it to close never had to do that before. What do I need a to do to correct this issue. I just reformatted my computer and may have accidentally checked something in chrome. How do I correct this issue? Thanks

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