Hi Everybody, We've been trying to use our Zenithink ZT-280, C-91 tablet. We type in something in a Browser Search,....then it Displays various sites. I try and select one by touching it, and nothing. It will not respond to my touch. I am however able to scroll very easily.on the internet. also, when on our Homepage, the touch screen works perfectly. Is there possibly an adjustment for this? Thanks in Advance!