Black flashes on render

Hi! I am rendering a sequence with premiere and I am having black flashes on the final movie. I tried different formats, but I don't know what it is. It looks like a random black frame every 10 seconds more or less...
I have my files on an external hard drive connnected through usb. Could it be something related to that?

Hi there - I am having a similar issue - black flashes on my exported video that are not there when I watched it on the timeline.
Here is my info:
1) Premiere Pro CC 2014
2) MacBook Pro
3) Intel Iris Pro Graphics
NVIDIA GeForce GT 750M graphics processor with 2GB of GDDR5 memory
4) Mpg4
If you have any info, I'd appreciate it! THANKS!

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Ok Guys, Im going to be updating how I fixed the issue for those that read, My monitor is a 1080p 75hz monitor, even though I KNOW its 60hz The Catalyst ( CCC )
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ALSO!
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APP Data
LOCAL
ATI
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Thought I would be a nice guy and update how I solved it for others having issues.
Peace, ZII
Youtube.com/videofletcher

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