EDIT:I found out what it was,it was a slider limit increaser,Thank you for all the all though <33

I seriously don't know what to put for the title for this oTL
I get this everytime I try to install sims3packs into the launcher and it worked perfectly fine the last time I installed content through the launcher.
I haven't installed any game mods,only custom content like hair,clothes and furniture
When I press continue it says "the sims 3 has stopped working" as if it as crashed but the launcher stays open and nothing happens

That message pops up when you have a custom script installed that has a version header with a value that differs from your current game version. Sims3Pack files can contain custom scripts too btw, so you'll have to search which one it is.

It's not because of the hug pillow,I just tried installing something else without trying to install the hug pillow,the same thing came up

it seems to be everything I've tried installing,even items from creators that I was able to install before

What I would do, is use CUSTARD: http://modthesims.info/d/390235 and open up every Sims3Pack file you have, and see what is inside it. It should show you any unwanted attached script mods.

Thank you,I'll try doing that
Edit:I checked all the files I wanted to install,none of them are corrupt ,that message also shows up when trying to uninstall a sims3pack

Did any of them have more than one .package file within the Sims3Pack?

MeisterBabySoul, it won't help to check the files you want to install. The script in question is already installed. That's why the message shows up. You should get the same message when you start the game, because under the hood the installer starts the actual game.

@Buzzler, I thought the script package would be found within the Sims3Pack if it was attached? Then when they install it, it gets installed in the game? At least this is what I have found happens to me before.

Well, it might be that the message also pops up when you attempt to install the sims3pack with the script. I have only seen it when the script was already installed, though.

Right, okay. @MeisterBabySoul, you might have to completely delete the files in your DCCache and DCBackup under (My) Documents/The Sims 3 and reinstall the Sims3Packs one at a time until you find the one that causes the error. Trial and error is the best way to go sometimes. And delete the files within the folders DCCache and DCBackup, not the folders themselves. Then slowly put one Sims3Pack in, install, and see if it causes the error. Then go to the next file and so on until you can recreate the error.