Error 1303 occurred while NI MetaSuite Installer was running

Hello,
I am getting the Windows error message 1303 during the installation of NI Software. Why does the installer show this error message even I am logged in as administrator. What is the cause of this issue? Is there any way to run this Software successfully? Any assistance would be really appreciated.
Bundle of thanks.

Error: NI MetaSuite Installer: Error 1303. The installer has insufficient privileges to access this directory: C:Program Files (x86)National InstrumentsSharedMIFMetaSuite. The installation cannot continue. Log on as administrator or contact your system administrator.
