If it doesn't work out of the box and the seller and maker don't answer, it's defective. Send it back. Besides it's Windows 8.1 RT (notice the RT?)
This means it's unlike your average Windows PC and you can't install any app you want. Only those apps Microsoft allows. It's a trap.
I am new to tablets but when I power it on all I get is a landscape graphic desktop and the Windows button does nothing to help!
Am I missing something or is it defective?