I noted that you say you are new to cycling, then in your last post you say that at 40 MPH downhill it feels that the wheels are going to fold in Half, maybe you get that feeling because you have yet to get your mind set into the fast downhill mode. May I ask did you buy the bike fully built, or did you have to assemble it from the box. If you build it yourself I would check that you have set it up correctly.
Check the headstock fittings check they are tight and no play on the Headstock bearings,
Likewise make sure that the bearings are not too tight.
Silly as it might sound, many a person self assembling their bike have ended up with the front forks pointing in the wrong direction.
Check that the front axle is seated correctly and running true.
The check the rear wheel to see if that it is correctly seated and running true. as a incorrectly rear wheel, will effect the feel of the bike.
Check If the tyres need to be set to either front or rear fitting.
Check your tyre pressures, as even a slightly under inflated tyre can give adverse handling conditions.
Failing that take it to your LBS and get them to give it the once over.