File I/O Error

HI, I am having a File I/o Error. I have deleted & reinstalled wow and battle.net multiple times now. Each reinstall has been onto my internal hard drive (C drive). I have unplugged all USB’s bar my mouse and keyboard. I have uninstalled curse forge & wow up, I have tried running as admin, I have re installed latest drives. Any other suggestions? only started occurring post pre patch update. Please help me !!!

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