why does my computer screen flash

  ainsley keen 14:15 08 Jun 2017

when i installed f.lux and CareUEyes on my windows pc,The screen flash every 2 seconds f.lux version is v4.33 download link click here version is v1.0.0.1 download link click here then i feel my computer running slower

CareUEyes and

  MJS WARLORD 17:40 08 Jun 2017

I had this once and somehow my single monitor was set as screen 2 in display tab.... might be wrong but worth a look

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