Thus, it does not automatically activate Windows Vista. It merely input OEM certification using Microsoft officially provided function (slmgr.vbs). This is not a Windows Vista activation crack.Limitations of Windows Vista OEM Certificate Auto Installer: You modify your BIOS to include necessary Windows Market code bit (SLIC table) of one of the OEM brand supported, and now need to install or insert the necessary OEM certification into Windows Vista system as your system is not installed with a OEM version of Windows Vista DVD.You download Windows Vista with SP1 integration DVD (6001.18000), and want to install directly Windows Vista SP1. You purchase your computer quite some time back, and only has Windows Vista RTM (6000.16386) version of installation CD.Who want to clean clean Windows Vista from fresh without the crap from manufacturer by not using OEM Recovery CD.Windows Vista OEM Cert Auto Installer is useful for following type of Windows Vista (including Windows Vista SP1) users: xrm-ms XrML Digital License) used for Windows Vista OEM activation, which allows branded computer owner with necessary SLIC table embedded on BIOS to achieve instant activation without contacting Microsoft online or by phone. The Windows Vista OEM Certificate Auto Installer can automatically insert and install the selected manufacturer’s or brand’s OEM certificate (commonly known as digital cert or.