Pro Tools LE – InstalIShield Wizard Error

Hello,
I have downloaded the Pro Tools LE compatible with my Windows 7 and also I have downloaded a version compatible with Windows XP. None of this versions wants to work, and I don’t have any solution for this. Please make me to understand why none of them are compatible with Windows 7, especially the Windows 7 version? How can I install this?
Thanks!

Pro Tools LE – InstalIShield Wizard
Error
The current Microsoft Windows version does not support this operation. occurred in Copylnf.cpp at line number.383 Other Error.1O Internal Operation :200
OK
