Snow no longer appears on ground in Winter

@sfalco12  The time clock being out of sync isn't supposed to happen anymore, but once it does, it's difficult to fix.  So if you have a backup version of your save to revert to, that would be the easiest option.

https://sims4.crinrict.com/eng/2014/09/save-games/#wiederherstellen

For the Nvidia graphics driver, try doing a clean uninstall of the current one and installing the newest version for your laptop, dated May 22.  Download Display Driver Uninstaller from here:

https://www.wagnardsoft.com/forums/viewtopic.php?f=5&t=3403

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).

Once your computer has rebooted, now back in normal mode, run the driver install .exe in custom mode.  Select "perform a clean installation" and install ONLY the GPU driver and the PHYSX software.

Reboot again, go back online, and see whether the snow shows up again.  Please test in a new save, just to keep things simple.