win xp outlook express

Straight from Microsoft themselves:

1. Click Start, click Run, and then type regedit in the Open box.
2. Locate the following registry key:
HKEY_LOCAL_MACHINE\Software\Microsoft\Protected Storage System Provider

3. Under the Protected Storage System Provider key are subkeys for the user profiles that are on this computer. For example, you may see a Default subkey, a Local Machine subkey, or a Username subkey. If the you have User Profiles turned on, click the Username subkey that matches your log on name, and export that key by right-clicking the key, and then clicking Export. After you export the key for safe keeping, click that Username subkey, right-click it, and then click Delete.
4. Quit Registry Editor, and then restart the computer.
5. Start Outlook Express, and on the Tools menu, click Account, click Properties, and then click the Servers tab. Type the password that you want to save, and then click Apply and OK.
6. Try making your connection to send and receive mailto see if saving the password is now working.

This has worked everytime I've needed to use it myself.

Jeremy Muchler