OK, I'm not sure what all transpired here but..... My TD3 would not load or save starting with a league game I had on Oct. 4. I tried everything listed here. The other day, after an MS update and reboot, none of my MS programs worked at all. I did a system restore to Oct. 16 (my earliest option). Since then, TD3 has been working fine. Loading, saving etc. The restore date was after it first started acting up so I'm not sure what it was that worked but I'm a happy camper again in any case.