I just got a new laptop running Vista so I wanted to backup and transfer all my Outlook signatures from my old XP laptop. Both are running Outlook 2007.

Outlook 2007 Signature file locations in Windows Vista and XP:

Vista:
%USERPROFILE%\AppData\Roaming\Microsoft\Signatures
(usually C:\Users\\AppData\Roaming\Microsoft\Signatures)

XP:
%USERPROFILE%\Application Data\Microsoft\Signatures
(C:\Documents and Settings\\Application Data\Microsoft\Signatures)

From that directory, just copy everything to your new computer.

I also wanted to transfer my POP3 account settings, but as of Outlook 2007 you can no longer do that Don’t ask me why Microsoft decided to remove this feature. There seems to be various workarounds and 3rd party tools but I chose to just enter my 10 POP3 accounts all over again.