computer question

For some reason I appear to be having these random files generate on my secondary HDD. Most of them appear to be empty however some of them contain a file with the extension .file that I can't open. I am able to remove these folders with no problem but they show up again after a little while...

I'm a beginner in overclocking (AKA never overclocked before, ever) and I'm planning on overclocking my 4690k once I get my Cryorig h7. I've been reading quite a lot about it and I'm a bit confused. In this article...

my youtube videos do not open but can get audio, removed Flash player because of problems with Firefox. Any other players I can use with "Tube" ?