The MSE

in the Windows 8 Consumer Preview is pre-installed with the Windows Defender security software in Windows 8 Consumer Preview. In fact, it is Microsoft's free anti-virus software Microsoft Security Essentials (MSE). This is an improvement of Microsoft. Before MSE mainly provided anti-virus protection, Windows Defender mainly provided malware protection. However, Windows Defender in Windows 8 Consumer Preview integrates the previous WindowsDefender and MSE features. In addition, it uses the same user interface as the current MSEBeta.

Obviously, Windows8 Consumer Preview, you do not need to install the MSE, and according to compatibility list, Windows8 consumer preview version is not compatible with first-generation and second-generation MSE MSE.