Two useful recomendations:

-Because it can corrupt savegames, I recomend you deactivate the steam cloud option from the game properties.

-Another recomendation about savegames do not loading. Install Steam out the c;\program files , set in the Steam exe, the runme.exe and runme2.exe in the \steamapps\common\Star Wars Empire at War, and the StarwarsG.exe, all them with compability start as administrator.

After it, save your games several times with new files and better in a day count where you have not played any battle.

This is a set of recomendation thinking avoiding the corrupt savegames. I have tested them and they can work but I do not guarantee nothing.