When you install Office, an error message similar to the following may appear:
Error 1303. The installer has insufficient privileges to access this directory: <Directory>. The installation cannot continue. Log on as administrator or contact your system administrator.
where <Directory> is the name of the directory with the insufficent privileges.
You will receive the above error if either of the following is true for the folder in which you are installing Office:
The SYSTEM group does not have Full Control privileges.
The Everyone group does not have Full Control privileges.
To prevent this error from occurring, make sure the folder location into which you are installing Office has Full Control permissions for either the Everyone group or the SYSTEM group. Check the permissions for the parent folders because the permissions on these folders may also cause this problem.
For more articles about how to troubleshoot specific errors in Office Setup: