Possible contamination of yahoo email page

Hi!

 

I have been experiencing something odd whenever I open the Yahoo email page.  Up at the top left I find the Notepad button with the following text to its left:  ק惡¦W³æ ³z¹L³q°T¿ýÀH®É¶i¦æ¡C

 

What happens next is that the text goes into blue then reverses to its normal color then back to blue and so on.  It's very difficutl to open the page when this happens.  A couple of times the browser has crashed. 

 

I never use Notepad.  No one else uses this computer.  Any ideas?

 

Robert Schneider

Berkeley MO  63134