rebecca

hey everyone i realy hope someone can help me please. I have a windows vista basic, and when i want to go onto the internet i use mozilla firefox which takes me to yahoo home page. Yesterday i turned on was prompted to do a scan(not sure if thats relevant) then when i went on internet as usualy there is an inch strip across the screen that my curser wont work on, half in the tool bar, half under the tool bar including the up arrow onthe side. I dont think its the actualy comp as when i go on normal int explora which takes me to google home page the whole screen works but i realy now nothing so im probs wrong about that. Ihope this makes sense and someone can help me please, please, please and thanks