Error occurred installing the QuickBooks

Hi whiz,
While installing the QuickBooks in my computer I got this below error message. It’s an independent system not connected with the internet and I have all the access to install and uninstall new programs and applications. Why this is happening? I tried several times to install but no luck. Please help me to hunt for solutions. Thanks.

Error 1321.The Installer has insufficient privileges to modify the file “C:Program FilesIntuitQuickBooks 2009DataCurrencies.dat”.
Note the error and type this in a Web browser:
www.quickbooks.com/support/install.html
