If you have installed Windows 10, you will know that the Notifications Center is not up and running in the build but if you are willing to live on the wild side, you can enable the feature, although there isn't much you can do with it right now.
Before you go any further, be aware that this is not a supported method by Microsoft - the file you download could corrupt your install and many bad things can happen. In other words, proceed at your own risk and expect the worst, but hope for the best.
If you are running Windows 10, you can turn this feature 'on' by going here and downloading the zip file. You can then run the .exe file after unzipping the folder and voila!, up comes the Notifications Center. Unfortunately, it doesn't do much right now and we can't get any notifications to show up, but enabling the feature is the first step towards making it work.
While we have not had any luck getting notifications to pop up, some users are reporting that the center is fully functional for them. As you can see in the screenshot below, notifications are showing up in the center.
Also, we are running this on the x86 version of Windows 10; however, we know that those running the x64 version have had issues getting the feature to work. If you do get the notification center to open, make sure to let us know in the comments below what version of Windows 10 you are running.
Thanks for the tip Adrian!