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PCI-6221 can't be detected in the MAX??!!

Dear all,
  I am surprised that PCI-6221 can be detected in the "device administrator" of my computer, but it can't be detected in the MAX after updating DAQmx to 8.0 from 7.4. I have uninstalled completely DAQmx8.0 and MAX on my computer, and then reinstalled DAQmx7.4 on the computer, but I can't see the PCI-6221 card in the MAX, and it isn't used by calling some DAQmx functions with Labview7.1.
  Could you anybody help me to fix this problem? Thanks in advance.
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I had similar problems in the past, although with other cards. I fixed it by opening the device properties in the Windows device manager and refreshing the driver (letting Windows to choose the correct one automatically).
LV 7.1, 2011, 2017, 2019, 2021
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Hi pincpanter,
  Thanks for your reply.
  I have reinstalled the DAQmx software several times repeatly, and at last this problem is closed. I think that DAQmx software has some bugs on the installation.
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