Ok, im new to this, so please forgive any mistakes I make and correct them.


#1. If you know that you have a compatible video card, etc, then go on. if not, buy one. If you are unsure, check the system requirements here
#2. If you get the digital signing error, try a few of the solutions here. Try solution 2 first. if that doesnt fix it, try 1 and 3 as well. If all else fails try all of them. If afterwards directx doesnt install during sims2 installation, keep reading.
#3. I quote from thesims2.com,

"I get a 'GETSETUP' or other DirectX error during installation.
Question


I get a 'GETSETUP' or other DirectX error during installation.
Answer


This error is usually caused by a faulty installation of DirectX.

First, make sure your disk is in the drive. Afterwards follow these steps.

1.
Open My Computer.
2.
Right click on the Sims2 icon and choose Open.
3.
Double-click on the DirectX folder.
4.
Right-click on the DSETUP.dll file and choose Copy.
5.
Close this window.
6.
Open My Computer again.
7.
This time, open your C: drive (usually called Local Disk).
8.
Now open the WINDOWS folder.
9.
Open the SYSTEM32 folder.
10.
Right-click on an empty space in the folder and choose Paste.
11.
Now try running the installation again.


If the issue persists you will need to reinstall DirectX.

You can get this program either off the disk, or from Microsoft's website.

To use the DirectX installer on the disk:

1.
Open My Computer.
2.
Right-click on the Sims2 icon and choose Open.
3.
Open the DirectX folder.
4.
Double-click on the dxsetup icon.

This will install DirectX 9.0c on your system.


If you would like to install DirectX directly from Microsoft:

Go to www.microsoft.com

DirectX is available on the Downloads page."

If all else fails, you have permission from me to punch bill gates

Oh, and I had the digital signing error and i fixed it like this.