Sims 3 Visual C++ couldn't be installed Error 2147024894

CordFN  I'd go for a repair install of Windows, not because it's necessarily the next step but because it's relatively quick and will address a number of potential causes of this issue at once.  A repair install doesn't delete your data as long as you choose to keep personal files and apps when you get to that step.  Here's how to do one (option two):

https://www.elevenforum.com/t/repair-install-windows-11-with-an-in-place-upgrade.418/

Heypuzzlezaddict,

appreciate your help.

Unfortunately I tried those steps already.

Anything else? :)

CordFN  Try manually uninstalling and reinstalling the VC++ runtimes in question.  Sims 3 itself only uses the 2005 x86 version, so start there.  Open Windows Settings, select Apps, scroll down to the Microsoft Visual C++ Redistributables, click on the 2005 version that does NOT say x64 (you may or may not have x64, but you should have x86, which isn't specified), and uninstall.  You can get a fresh copy here:

https://www.microsoft.com/en-us/download/details.aspx?id=26347

Install it and restart your computer before trying to install Sims 3 again.  If that doesn't work, uninstall every 2015 and newer VC++ runtime, then install the 2022 x86 and x64 runtimes found here:

https://learn.microsoft.com/en-us/cpp/windows/latest-supported-vc-redist?view=msvc-170

These cover everything from 2015 and newer, so you only need the two copies.