There are two circumstances we know of which can result in this error.

You may be attempting to install an old version of Language Lab on a system with Windows User Account Control (UAC), such as Vista, Windows 7 or Server 2008. Please ensure you are installing the latest version. If not, please call us on +44 20 7371 7711 or email us on education@eurotalk.com.

You may be attempting to install a new version as an update to an older version that did not support UAC. If this is the problem, then first use Control Panel to remove the old one. Do not select any options to remove shared directories, databases or site information unless you really want to do this!