Those are Crash/Memory Dump files. Whatever version of CCleaner you have installed is obviously buggy and crashing allot. If you want to submit those to the developers/bug fixers you can just ZIP all of them and then attach/upload them to your post above.
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What security software do you use?
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If you run Reliability Monitor (start..run in Windows) it should give you some idea of why CC crashed
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Hi hazelnut
My security solution is Malwarebytes antimalware 3.5.1.2522 with Ccleaner 5.46