As I use my machine, especially writing on boards such as this, and I depress the D key in a word, for example, the add bookmark prompt will popup. Sometimes it will start zooming in and out as if I am using the Ctrl key with the scroll wheel. And when I press Backspace it will erase the entire word. Earlier advice (I could had sworn I had asked this here) was to format Windows.
Instead, I got a new computer, with a fresh copy of Windows 7 installed on it. And lo and behold, the problem did not go away. I did replace the keyboard. Replaced the mouse. This is more of an inconvenience over anything and I have not heard of any other folks complaining about this issue (I work in IT). And I am flummoxed as to why this keeps happening to me.
Not too sure what else it can be. My only recourse when this does occur is to strike the Ctrl key a few times then the problem will go away for the time being. However, it does come back. Either five minutes later, or an hour, or a week and a half. There is really no pattern as to when I notice this, however, it seems to happen most often in a web browser opposed to a word processor.