IE6 prompts to remember password

1. Navigate to Internet Explorer -> Tools menu -> Internet Options ->
Content tab | Personal Information section | AutoComplete button.
2. Under "Use AutoComplete for", de-select the 'User names and passwords on
forms' checkbox.
3. Click Ok to apply the setting.

The following method will clear the credentials already cached in Windows
XP joins a workgroup:
1. Open Control Panel and go into User Accounts.
2. Select the account and then choose "Manage my network passwords".
3. A "Store User Names and Passwords" dialog will appear.
4. Click Remove button to clear any passwords (for the affected sites.)

How to use the AutoComplete feature in Internet Explorer 5 and 6