"ghost" is typing on my XP machine

From: JO (reddam1@msn.com)
Date: 07/03/02 

From: "JO" <reddam1@msn.com>
Date: Wed, 3 Jul 2002 06:34:30 -0700

>-----Original Message-----
>On a regular basis somebody or some program is sending
>keystrokes to my machine. Whatever is being sent doesn't
>make sense. it is stuff like "they may be a man of the
>two". Before the characters appear a few underlined dots
>show up then the words replace the underlined dots.
>I've enabled the firewall option that my Network card has
>but that didn't help. I have Windows XP Professional
>installed. Windows Messenger is installed but the typing
>occurs even when Messenger is not running. Any ideas on
>how to fix this would be very appreciated.
>.
>I am having the same problem however it started a couple
of weeks ago. I was running Wndows ME and I noticed that
wherever there was a space for a message(e-mails,tracking
block on UPS site,etc.) I got this scrolling of typed
messages. They do not always make sense as if I am getting
only one side of a conversation.I upgraded to XP and
subscribed to McAfee Security Services and Firewall Plus.
This has not solved the problem. A man in my work place
said I had been hacked and the person was using my ISP
info. MSN was contacted and the tech guy said the same
thing but told me to contact my vendor (as in the HP
factory)!!? The MSN tech offered not other info or support.
A tech at Best Buy where I purchased my PC said it wasn't
hacked but to bring it in for servicing.!!? I have been on
the net since 1993 and have never been without a virus
program and I have not had a problem. I do not have voice
activation on my pc. Any confirmation as to being hacked
and a solution.