Re: Can't save the progress in the Sims 2 UC

@Rassatu , try moving your Sims 2 folder (Documents > EA  Games > Sims 2) to your Desktop and do NOT delete it! This is where your saved game information would be stored. Next start up the game allowing for a new Sims 2 folder to generate. Please remember that none of your CC/Mods will be present at this time. Next start up a new game to test to make sure everything works and play for about an hour or so and then save and quit the game. 

Two things to remember. One, do not play with any other applications running while playing Sims 2. This is to make sure that your computer isn't using extra RAM and can devote all resources to the game. Next, when finish playing go into the Sims 2 folder in Documents and delete the "Accessory.cache" and the "Groups.cache" as these can become corrupt and removing them insures a clean game. 

Please report back.