Windows 8.1 Pro VL with December 2014 Update (known as Windows 8.1 Update 2) contains latest hot-fix from Microsoft. Everything are intergrated and will be installed automatically when you start this Windows 8.1 installation. .Net Framework 3.5 and .Net Framework 4.5.2 are also included in this package and some optional updates such as DirectX Juni 2010, KB890930 , Defender Updates. This Windows 8.1 release is available in the following languages: English, Spanish, Brazilian Portuguese, Portuguese, German, French, Italian. install.wim is compressed to recovery format (install.esd) to save many MBs so only clean installs can be made with this format, not upgrades.

Windows 7 was primarily intended to be an incremental upgrade to the operating system, intending to address criticisms faced by its predecessor, Windows Vista (such as performance improvements), whilst maintaining compatibility with hardware and software designed for Vista. Windows 7 Service Pack 1 (SP1) is an important update that includes previously released security, performance, and stability updates for Windows 7. SP1 also includes new improvements to features and services in Windows 7, such as improved reliability when connecting to HDMI audio devices, printing using the XPS Viewer, and restoring previous folders in Windows Explorer after restarting.