But, the company did and that’s why many people are having problems with Windows 8.1All in one, specifically in terms of its booting uptime. And the software developers never intended to let go off the topmost part of the operating system. The entire Windows 7 platform and software were left untouched when Microsoft launched Windows 8.1 All in one ISO. Why would you want to lose hundreds of dollars over a single mistake? Of course, you don’t! So, the best thing to do is to make sure that you’re going to perform the upgrade the right way.