Keyboard writes two lettters at once

Jul 1, 2018
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Hello there, i got a problemm with my keyboard i tried a lot of things to fix like unistalliing its driver or presssing the two shifts at the same time but nothing worked at all. I tried it my friennd's computer and it worked well.
I got windows 7 service pack1
And a g31 motherboard
I really wish if somebody else can find me a solution