Try this method Tree.
IE is always the same layout regardless of the operating System.
I haven't tried IE8.0 yet. So am not qualified to tell you where these settings are ,though it will be in a similar location . I Know this from going from version 6 to 7

Here are the Version 7 details:
Go into the Control Panel ,click Internet Options
Next click the
Content Tab (in the middle)
In this Window look for the
AutoComplete section.Click the
"settings" button
In the Next small window
untick the Web addresses and Forms boxes the Usernames and Passwords box comes into play rarely, Leave that ticked (it can act as a life saver if you forget?) NOTE it is also featured on Google Chrome
TIP Do leave the "Save Password" Prompt box unticked
Lastly Do read the Message at the Foot of the Window before you click the "OK" button to delete the list and Close the page.
No way back once you have done that!
One more
optional job in Internet Options
Click on the Advanced Tab (furthest right)
Now scroll down the List to the Browsing section
Now continue down until you see
Use Inline Autocomplete Untick this box. Click Apply ,then the OK boxes to save and close the window.
Be aware that You will
not be able to use saved passwords(In Internet Explorer) while this box is unchecked
