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strange keyboard problem on a Sony VAIO laptop

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strange keyboard problem on a Sony VAIO laptop

I have a Sony VAIO laptop VPCEA4S1E running Windows 7 Home Premium (64bits).

Since a couple of days I have a strange keyboard problem: some keys (1, 3, 5, 7, 8, 9, p, Backspace, F1, F3, F5, F7, F8, F10, F12) are not working as expected.

I have installed the tool ShowOff to display every keystroke.

Pressing the following keys results in some different (series of)keystrokes:

1 -> F1 1 F1
3 -> F3 3 F3
5 -> F5 5 F5
7 -> F7 7 F7
8 -> F8 8 F8
9 -> F10 9 F10
p -> F12 p F12

Backspace -> Backspace Insert Numpadlk
F1 -> F1 1 F1
F3 -> F3 3 F3
F5 -> F5 5 F5
F7 -> F7 7 F7
F8 -> F8 8 F8
F10 -> F10 9 F10
F12 -> F12 p F12

I tried uninstalling/reinstalling the keyboard in device manager.
I tried booting in safe mode.
I reinstalled SONY drivers.
I did a system restore before the day that this problem came up.
Nothing solves my problem.

Virtual onscreen keyboard is working fine.

Hoes anybody any further suggestions? Thanks!

10 ANTWOORDEN 10
hollander95
Ontdekker

HIk begrijp het hartelijk dank