Remember Me ~ Disabling Automatic Sign-In

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To Temporay Disable it
(Here are the following steps)

• In Microsoft Internet Explorer,
'Tools → Content → AutoComplete → Clear Passwords'.
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To Permanently Disable it
(Here are the following steps)

If you're using Microsoft Internet Explorer, it's possible that you've enabled the AutoComplete feature. If you don't want AutoComplete to automatically sign you in to your Google Account, please follow these steps:

1 ~ Click the ‘Tools’ menu at the top of your browser, and select ‘Internet Options’.

2 ~ Click the ‘Content’ tab at the top of the dialogue box.

3 ~ Click the ‘AutoComplete...’ button, and diselect the checkboxes 'Usernames and passwords on forms' and 'Prompt me to save passwords.'

4 ~ Click ‘OK’.

The above was found at this link:
http://www.google.com/support/accounts/bin/answer.py?hl=en&answer=39273

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