Not sure what changed, but I can no longer play Batman. When it logs into GFWL, it pops up asking my account and password, I enter it, it seems to pass, then says I am not logged in and enters an annoying login loop.
GFWL continues to work for Dawn of War II.
Any ideas?
Check your date and time and synchronize with time.windows.com
Delete temporary internet files and cookies
Windows Update
Check your antivirus/firewall
Click "sign in automatically" when you do get it working.
Check for game title updates, and make sure you have the most up-to-date GFWL Client (or "Marketplace App" if you'd prefer)
Hope this helps.
Also check out EIDOS for the latest update, download and patch. Unless you use steam of course.