Device manager and network connections window blank

Cause

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This issue would occur if the default permissions on the following key go missing: HKLM\System\CurrentControlSet\Enum\Root

The default permissions are as follows,

• Creator owner – Full permission.
• Everyone- Read only.
• System Account – Full permission.

Resolution
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Open the registry editor and add back the above mentioned permission to the HKLM\System\CurrentControlSet\Enum\Root  key and then reboot the server.