Blink stuck running on Arduino

I just got my arduino genuino uno from
It powers up and the green led stays solid and the L Led keeps flashing. The arduino ide says programmer not responding. I've tried all forums but nothing has worked. Any suggestions?

If you got it from Amazon there is a chance you need drivers such as the CH340 / CH341

But you have not given enough details for anyone to make an informed decision.

OS ?
Type of USB port used (NOT USB 3.0) ?
Steps you have taken to try cure the problem. ?

Any other relevant information that my be of use