Q:
The image appears on screen is kind of square shape and in a mess. I have no idea what is going on there, and what causes the symptom. Anybody could give me some suggestions and help? And I’m not sure of the antivirus software I use. My laptop is HP TC 1100.
A:
1): I think there’re three possibilities:
   1. It might get dropped, or there’s some screw loose on screen.
   2. The screen is damaged, circuit gets fallen. And the worst situation is that the GPU chip overheating on motherboard causes the damage.
   3. The laptop might be infected by some unknown viruses which are really tough.  You can reformat your system to factory settings with recovery disc, and then install good antivirus software. Probably this could solve the problem. Many viruses like this would get laptop system unstable and make screen in a mess.
Hope this could help you!