When I sign onto Messenger in Windows XP, there's a drop-down menu of sign-addresses I can use. Is there a way to keep those addresses from appearing, so I have to type it in each time?
Yes there is a way, although you will need to modify/create a key within the system registry. Open the Registry Editor, and navigate to the key:
HKEY_LOCAL_MACHINE\ SYSTEM\ CurrentControlSet\ Control\ Lsa
Create a Value called "disabledomaincreds" and set it to...