Installation of GQUSB in Windows Vista: Error 1303 Occurred

I am using a laptop computer with Home Windows Vista 32 Bit.
I am trying to install GQUSB Program, but an error message appeared.
Please help me on resolving this issue.
Here’s the screenshot of the error message occurred:

Error:
Error 1303.The installer has insufficient privileges to access this directory: CProgram FilesGQ USB Programmer. The installation cannot continue. Log on as an administrator or contact your system administrator
