I have reported this before, but it definitely bears repeating. A friend of mine is high up in a particular Computer company. He told everyone that if you purchase anew computer with Windows 10 preloaded, you should not have any problems. He actually likes it. But, NEVER, NEVER upload 10 into your current computer. Your current system will be supported for a long time and the upload will cause you difficulties - either right from the start or not too far down the road. But, I repeat, if you purchase a new computer with 10 preloaded, you should not have any problems.