When my Latitude D520 XP Pro SP3 is started, something grabs COM1 and I can't access COM1 until I disable and then enable it in Device Mgr. After that it works fine until I restart my laptop again.

   How do I find what is grabbing COM1? I've run Autoruns but there are so many items I don't know where to begin. How would I tell which items use COM1? Any ideas?