Hi...

its should Possible your download Version is not download in Correct way. I mean your Download Should Stops in Way or Some Error Occurs.
Or Check Out Online Help From Software Publisher.

Thank You :)

Thank you

BitLocker normally encrypts entire drives and partitions, but you can also create encrypted container files with tools built into Windows. Such encrypted VHD files can easily be moved between systems, backed up, and hidden when not in-use.

When you try to install a program that uses the Windows Installer in Microsoft Windows XP, the program does not install, and you may receive an error message that is similar to one of the following error messages:

The Windows Installer service could not be accessed. Contact your support personnel to verify that the Windows Installer service is properly registered.

The Windows Installer service failed to start. Contact your support personnel.

Internal Error