During installation of TI-Nspire Family Software I am getting an error message saying that the software is already installed though I have not done it yet. I do not know why it is happening. What should I do now?

Error:
TI-Nspire™ Student Software
Another version of TI-Nspire is running.Installation will not continue.
TI-Nspire™ Student Software
There was a problem running the installer.Contact TI to resolve this problem.[Installing].
- Login or Signup Now to post comments

Sometimes when you download a software, it can be downloaded twice, missing your concern. Or when you install it, it's also can happened twice. So if TI-Nspire Family Software can't install and an error message displayed in the screen, probably the problem have occurred I told you before. So you have to remove your latest software from your pc. And make a try to remove the existing copy then. For doing this, follow the steps below-
If you are using windows XP then go to start button.
And go to settings>Control panel
Double click on add or remove program
Now a list will be open that contains program that are installed into your computer.
Here just find out TI-Nspire Family Software and remove it from your pc.
Now download again the full version of the software. And installed it again to your pc.
If it not works, you must be paid a visit here- http://epsstore.ti.com/OA_HTML/csksxvm.jsp?nSetId=109606
Here you can solve your error problem more efficiently.