Does not work, even with Windows 8.1!

I purchased this monitor thinking that it would really enhance operations of Windows. At first, it connected beautifully to my system, and then it suddenly stopped working with the DVI cable. It even bought another dvi cable, and still it would not give a picture. So, I started using the included VGA cable, and again, it worked beautifully...for about a week and then it started flickering and gong to black, and then went completely and finally to white. The touch screen nor anything else would work and I could not revive it. It appears that this has happened to a number of customers, and that HANNspree knows this, but refuses to recall the brand for repairs. My advise is to not purchase this product, it is unstable, unreliable, and unsafe. They further will not stand behind their warranty, so unless you can return it within the period that you are covered by sales receipt, you may be out of luck.