Sims 4 suddenly lagging when it wasn't before

@Bloozal

Probable reasons:
1.Cause - outdated mods

If you have any mods
Move the mods folder to the desktop.
Delete localthumbcache.package file in the game folder
Fix the game in Origin.
Origin/Library -right click on TS4 - option "Repair game"
You have to wait until Origin will fix all packs, not only the base game.
Turn on the game to create a new, empty mods folder. Check if a game is working now without mods.
Then copy from desktop your mods and CC and paste it in the new mods folder. First, paste script mods every time checking if the game is OK. Do the same with CC but if you have a lot of this, try the 50/50 method

2. Cause - connection with internet
Disconnect your internet completely and try without this.

3. Cause - problems with the computer (The computer does not meet the requirements of the game, failure Windows updates. week graphic card, outdated graphics card drivers, software failures, the ventilation system is dirty and the computer overheats when it is working hard)
Could you post your Computer's DxDiag?
To gather a DxDiag on your computer, please follow the steps here: https://help.ea.com/en-us/help/pc/how-to-gather-dxdiag-information/
You can attach the txt file to your post directly in option "Reply" - not Quick Reply

I don't work for EA

I have tried the repair option and I have tried opening the game without any mods as said in the post above. 

Do you have any programs open in the background?

Can you try empty your %AppData% folder?

On windows tap the Windows button and type %AppData% then press enter, remove everything in there.

Does this help?

Hi there @Bloozal ;

This is sounding similar to an issue I had back in the day where Sims who were using old clothing mods were lagging up my game because it couldn't find the .package file; have you swapped around mods in the last few months, by chance? Old mods may have rooted themselves into some of the non-active households, and cleaning out those auto-generated households may help clean up lag issues/crashes. You could also edit each of the households, but that will take a long time.

The steps above are more specific to one neighborhood; I'd recommend before you start deleting households or anything, to start by backing up your neighborhood and saves (Carl's Sims 4 Guide has a very clear method of doing this; you can read it here.) and attempting to run the game on a fresh neighborhood, to see if you have the same performance issues. If you do, it may be something more related to the system than the application.

Make sure you try @kreatora 's steps first though, as they are less invasive and require less manual backup/restore than my method.

- B

It took me a couple tries to figure it out but it was definitely my graphics driver. I didn't even realize my computer had been sending me alerts about it until I knew where to look. I downloaded the graphics driver off of the manufacture website and my game is working way smoother now. I can actually play it! I'm so relieved, thank you so much.

Well ofcourse i meant the programs that aren't open, but this has helped with troubleshooting problems i had before. So it was just a suggestion