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what exactly you already tried from mentioned hints ?
( HAGS, drivers, overclocking , confliction applications , … )
I can see nowhere that you give more informations as sentence like " nothing works ". A ‘discussion’ is more as this 
What we know is, that you re-installed c++ lib and made a sfc scan. Anything else ?
What are your system specs ?.. Nvidia or AMD GPU ?.. etc…