Sims 3 white lines

@Bts152  Try uninstalling both graphics drivers, Intel and Nvidia, and reinstalling them.  It's important to uninstall the Nvidia driver first and to reinstall the Intel driver first, so there's never a point where you have the Nvidia driver installed without the Intel one.

Download Display Driver Uninstaller from here:

https://www.wagnardsoft.com/forums/viewtopic.php?f=5&t=3300

Download fresh copies of both the Intel and Nvidia video drivers from Dell:

https://www.dell.com/support/home/en-us/product-support/product/g-series-15-3500-laptop/drivers

Next, take your computer completely offline—disable wifi and/or pull the ethernet cord—and double-click the DDU.exe.  Take note of where the file will land, and click Extract.  If it's easier, you can copy the path and then paste it into the address bar in a File Explorer window.  Open the folder and then launch Display Driver Uninstaller.exe, and you'll get a message that you're not in Safe Mode.  Click OK, then go to Options and enable Safe Mode dialog.  Here's a screenshot of what your options should look like; make sure the box in red is checked:

Close options, and the DDU, and then open the DDU.exe again.  For launch options, choose "Safe Mode (Recommended)," and then click Reboot to Safe Mode (you'll need your password, so find it before rebooting).  Once you login, you'll see this:

In the blue box, choose GPU, then Nvidia if it's not already showing.  Then click Clean and Restart (red box).

Repeat the above process, except when you choose GPU, now choose Intel.

Once your computer has rebooted, now back in normal mode, run the Intel driver as an admin: right-click on the download and select "Run as administrator."  Restart your computer, and run Nvidia the driver install .exe in custom mode.  Select "perform a clean installation" and install ONLY the GPU driver and the PHYSX software, if you have a choice.

Reboot again, go back online, and see whether the game works normally.  If not, let me know.