I've been trying numerous things over the course of a couple of months where this problem started, like :
https://productforums.google.com/forum/#!topic/chrome/_AUhHQ-t-fE
https://productforums.google.com/forum/#!topic/chrome/kU5XoT53ZTI
https://productforums.google.com/forum/#!msg/chrome/SoNvK2S27IY/QCfZTl1MCgAJ
https://support.google.com/chrome/answer/6086368?hl=en&vid=0-603322537270-1478270843400
I also tried launching chrome as admin, added Everyone in pepperflash security options with full privileges. Nothing has worked so far. Flash simply refuses to play on many websites. I can't even load a pdf, it displays this message. I don't have suspicious plugins installed (like adblock etc). Is there a way to fix this? Thanks in advance.