Ensure your hardware or virtual machine (VM) meets these recommended specifications: Processor: 1 GHz 64-bit (x64). At least 1 GB RAM (2 GB+ recommended for Ultimate x64). 40 GB free hard drive space. DirectX 9 capable with a WDDM driver (for the Aero theme). 2. Create Installation Media

Most "April Repacks" do include the Extended Kernel, but some do. Verify the repack notes carefully.