why in xp i press one button but write 2letter !?

hi all
i have problem with my xp
i dont know why, in word or firefox, and ….
when i want to type something, when i type 1letter but write two letter that the 2ed letter is not the semilar .
Example : i want to type “read” write “rtehavdp”
can anybody help me !?
thx
Answer #1
you may have keyboard problem, not xp…
try another keyboard
Answer #2
You have a virus, I believe
Answer #3
Both can be possibly right.. a virus even but i thing its upto your keyboard. Try virtual keyboard in Windows.. if it works correcty then more possibly not coz of virus!
Answer #4
Also check for any driver updates!
But Virus/Malware scan would be high priority
Answer #5
It can be a by-product of a poorly written keylogger.