hydraulic warning

When I open the Q400 a warning is sounding and the hydraulic valves switch rapidly from open to closed and the hydraulic pressures jump up and down from zero to max. Seems to have occurred after upgrade from win 8.1 to win 10. I have uninstalled and re-installed twice to no avail. Oddly, after uninstalling Q400, it's still available in FSX and won't go away. Any ideas would be welcome.

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