May or may not be what you are looking for. It's the only thing I can think of.
At the top of this page click Tools/Internet Options OR from Start/Control Panel/Internet Options.
When Internet Options opens, choose the CONTENT tab.
Click the "AutoComplete" button.
An "AutoComplete Settings" dialog box appears. Uncheck User names and passwords on forms.
You might also want to delete autocomplete history.
Click OK to close AutoComplete box, then OK to close internet options.
Let us know if this works.
Edited by Queen-Evie, 30 April 2010 - 01:34 PM.