Check here: NOTE: The single (current) user Startup folder is a hidden system folder located at:
C:\Users\(User-Name)\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup
---------- Post added at 03:40 PM ---------- Previous post was at 03:38 PM ----------
Also here if you can logon as the user, registry locations:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
AND
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce