Nekem volt hasonló bajom. Találtam a neten egy megoldást, ami elég hosszadalmas, meg elvesznek miatta a mentések, de másképp nem tudtam helyrehozni a live-ot. Szal csak akkor ajánlom ezt, ha nem találsz más módszert. Ráadásul nekem nem pont ez a bajom volt (értsd: nem írt ki semmi hibát csak nem indult el), szal nem 100%, h rajtad segíteni fog.
You'll need to uninstall Games for Windows Live from your system and also anything such as Windows Live Messanger (and anyway else that makes up the Windows Live Essentials). Also, uninstall Windows Live Sign-on Assistant if it is installed, as it'll probably conflict. Once you've done this, restart so to make sure none of the DLLs are being used. Once booted back up go into Program Files and Program Files (x86) (if you have it) on each drive that it exists (C: and D: for me) and try to delete the Windows Live folder from each Common Files\Microsoft Shared folder. Now are this, download CCleaner (it's free and can be found easily in Google), install it and runCleaner as well as Register->Scan for Issues and fix all issues (you may need to do the registry scan a few times as it doesn't always pick everything up). Next step is to install Windows Live Essentials (you'll need to install at least one of the programs in the package to get the DLL you'll need, I did Windows Live Messenger). Once this is installed, reinstall Games for Windows Live and with any luck it should be working now.
Hope this helps your issue. I discovered this worked for me after I tried loads of other fixes that did not work.