If an UnauthorizedAccessException occurs and _disabled is set to true, ensure...

If an UnauthorizedAccessException occurs and _disabled is set to true, ensure subsequent calls to this method will not cause another UnauthorizedAccessException. (#589)

StackExchange.Redis/StackExchange/Redis/DebuggingAids.cs

@@ -335,7 +335,7 @@ public static bool TryGetSystemCPU(out float value)
                 // this shouldn't happen, but just being safe...
             }
 
-            if (_cpu != null)
+            if (!_disabled && _cpu != null)
             {
                 value = _cpu.NextValue();
                 return true;