So today i installed fallout 3 again, with no issues. I played around 3 hours. After i came back from work i changed my xblox live tag, since then i cant load my savegame. And now if i want to change my xblox live tag again i need 800 microsoft points. Is there anyway to get my savegame back? :S

thank you.

The savegames are done by your tag, obviously. So what you need to do is create a new profile and use an existing one. This time put in your new gamertag and type in the the email and password for that tag.

GFWL isn't good at all, it doesn't track your gamertag. So it thinks you're still using the old one.