Try to install with these steps:
You must install using Administrator privilege.
First disconnect from the Internet so you can safely disable your antivirus and firewall software programs.
Close any other open programs.
If installing from a downloaded installation file, then double-click the file to start the install process, then skip the CD steps below.
If installing from a CD, insert the CD. It should start installing automatically. If it doesn't, then launch the CD this way:
Hold down the Windows+R keys to open the Run window.
Click Browse, and then navigate to the TurboTax CD on your CD/DVD/RW drive (usually Drive D).
Double-click the setup.exe file.
Click OK to launch the installer.
After installing, be sure to re-enable your antivirus and firewall programs before connecting back up to the Internet.
Reboot (restart) your computer.
Open TurboTax and run the updater.
This answer has been verified for accuracy by an Intuit expert employee
