Hello.  I'm currently using Phoenix Miner 5.5c and getting this error message with my NVDIA GPUs. I have already copied the nvml.dll to c:\Windows\System32\ and still getting the same error.  Any suggestions?

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I'd go to the Nvidia website, grab the latest driver and do a clean install of the driver.

Here's the link:
https://www.nvidia.com/Download/index.aspx?lang=en-us
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I did this already and it didn't resolve the issue