Fable 3 needs GfWL in order to download additional DLC content for which you might have keys. It's pretty much a GfWL game and can be launched without Steam if you wish.
Save corruption on the PC version of Fable 3 is not that uncommon. This happens to the Autosaves. YOU MUST OCCASIONALLY DO MANUAL SAVES IN FABLE 3.
It's not immediately obvious that you can do so, use the Gear Icon on the wall in your Sanctuary to manually save the game.
If anyone needs a co-op partner to do achievements or just to kill some Balverines, let me know and I'll fire my copy up.
Wise words that man. The save corruption is a thing. My co-op partner lost his original character due to this.
I also would be happy to help out achievement junkies in this one. Most of them are straight forward. A few do require you to play co-op with another player who has an avatar of the opposite gender. I'll build an avatar ("toon" I think you younguns call em now?) of either gender to help people get those ones.
Trading is also required for the two collectable achievements. "All Weapons" and "All Clothes". I'll do what I can to help there as well.
Pro-Tip. To get some of the more rare accessories, become acquainted with the beauticians. If they like you they will randomly give you gifts. Also do this with the chefs, as they are the only characters in game who can gift you the Chefs Hat, which is required for the "all clothes" achievement, and the rarest random item in the game.