phina1234 Did you delete or at least remove the entire Sims 3 folder that contains saves and other user data? If not, please do so now.
If that doesn't or didn't help, please provide a dxdiag. Click Windows key-R, enter dxdiag in the run box, wait for the scan to finish, click "Save all information," and save the file to your desktop. From there, you can attach it to a reply using the paper clip (Attachment) icon included with the other formatting buttons.
Please also let me know how far you get in the process of launching before you see the error.