I would certainly recommend manual partitioning before install windows (and also endorse the recommendations above - C drive for op sys and installed apps, Second partition for data). I'd also recommend looking at Acronis True Image (or similar - there are some free packages do similar jobs) to enable you to image your drive C to an image file to be stored on the data drive. With standard compression this would generate a file just a little more than 50% of the space used on drive C and can enable a full recovery including all updates, configuration and installed apps in minutes). A good third party app which can enable partition management and also includes a tool to burn a bootable version to cd is easeus partition manager which...