As most of you probably know Windows 8 RTM was released to MSDN and TechNet subscribers on 15 August. As could be expected I immediately downloaded the bits (Windows 8 Pro (x64)). Normally I would go for a fresh install, backing up my data, formatting the C drive and reinstalling from scratch, but decided on trying out the upgrade path this time around. In this post I will detail that process, as well as sharing my experiences with you – and give you some advice if you are contemplating doing the same thing. I did this on both my aging laptop (HP Pavilion dv7-2114eo) and my aging homebuilt desktop based on the Intel Core2 Quad Q6600 CPU. The results of the upgrade process varied, and turned out slightly different, but I will come back to that later in the post.