Just uninstalled my old version of FFXI so I can use the Abyssea expansion I bought as the new Ultimate Edition from Steam. Download went Ok, but took me a bit remember to find my old password so I had to wait to finish log-in because it took more than three tries. Woke up this morning to log-in and now POL is popping up with an "Error Code POL-5312" which a friend list communication error. No big deal to me I pretty much never use it, right? I keep on rolling, get to the black screen when it swaps to the windowed FFXI, and suddenly "POL has stopped working correctly. Windows is searching for a solution."

Checked the version and files with the in-POL tool. Nothing there. Checked the firewall and POL and FFXI Ultimate Abyssea Edition both have access to the internet.