Certain keyboard keys not working


I bought an acer net book almost an year back. Some day back some of its keys ceased working. I googled for an immediate solution but couldn't find anything useful to me. Then I turned to this forum. I access net via my galaxy note & use the default browser as well as one browser. In both browsers when I opened digit web page a micromax 3g single ad appears on either sides & keep on annoying by covering the entire screen as I zoom in. The fist shown in the ad was very apt as I couldn't escape that mighty fist... :p (sorry guys that's the reason I couldn't search for any previous similar threads)
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