as wireless mice/keyboards have been known to be the underlying cause of such things.
Also check to ensure that you do not have any other wireless devices (such as telephones) that may be causing interference.
Hi ... I have a PC using Windows XP. I have a 17" LCD Samsung and wireless mouse. IE7, For some reason, when I try to on the "Address" bar to type in a URL, the screen jumps up and down quickly. I have to click 2 - 3 times to get it to stop but even then sometimes its difficult to click on a pull-down or enter a URL.
Can anyone give me any ideas?