I have many clients that are getting excited and a little anxious that they haven't received the Windows 10 upgrade yet.. some have received the pop up stating it is ready and have contacted me, but I am getting to them as fast as I can.. the thing is, YOU HAVE A FULL YEAR to get this done as that is how long the free upgrade lasts.. Not that you should be waiting that long. With some people, they would rather hold off a while--until all the bugs are worked out--yeah right! First of all this has been in a public beta for over a year before it was final and released to the public on July 29, 2015 therefore you shouldn't really have to wait at all. In fact most of the windows updates happen during the upgrade process as well as once the windows desktop appears.. There will be consecutive windows updates following this, most likely on a daily basis and so if you are like most of my clients who I tell to leave their computers powered on, this is a good thing because it can stay current. However, if you are leaving it on then it is not getting restarted either and that is something Windows will now schedule in 2 days.. but why wait that long--if you aren't sure if everything is up to date, just restart your computer.. upon restarting it and it connecting to the internet, it will check if there are any new updates. As well, the fact that you just restarted it, if there were updates waiting to be installed that required the computer be restarted, you just did that so all should be good.
Now, if you are reading this and thinking to yourself, "well this is great, but I haven't got it installed yet!".. and you really want to do this on your own, you should pay attention to the first screen that comes up, wanting you to answer a number of questions, or as Microsoft words it most of the time by placing the (recommended) tag after what they want you to choose--most of the time you don't want that option, especially initially when they prompt you to "get going now" and use the "express settings".. You may want to follow this very detailed update process from The Register as they explain what security and data is being shared by Microsoft. Personally I do not suggest signing in to Microsoft on start up either. When you install apps, choose to sign in each time, otherwise it will switch you to signing in to your Microsoft account on start up again.
If you really must install it then this should seriously save a lot of headaches later on! If you are an existing client of mine and have not received your upgrade, just drop me a line and I will move you to the top of the list.. you know what they say about the squeaky wheel...