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While the Microsoft Windows 8 Upgrade Key is intended only for upgrades from earlier Windows versions to Windows 8, there could be valid genuine reasons when a user would like to do a clean installation of Windows 8. If a user tries to do a clean install activation using the upgrade key they are shown the error below and no activation occurs. Luckily, if a user owns valid license key for previous Windows version they can use a simple registry hack (I assume legally) which enables them to bypass this activation error message.

Invalid Product Key

"The following failure occurred while trying to use the product key:
Code:
0xC004F061

Description:
The Software Licensing Service determined that this specified product key can only be used for upgrading, not for clean installs."

After installing Microsoft Windows 8, the very first thing you should be doing is to activate your copy using an genuine product key. Microsoft Windows 8 activation procedure is similar to Windows 7 and all you need to do is to supply the activation application your correct product key and have an active internet connection.

Microsoft Windows 8 will automatically prompt a user via "Action Center" notification as soon as an active internet connection is detected after installation, all a user needs to do is to follow onscreen instructions (as also shown in images below) and complete the procedure which hardly takes few minutes for online verification of your product key with Microsoft licensing servers. Without activation of Windows 8, users are restricted to use all features of the operating-system like Personalization and are nagged from time-to-time.

UltraVNC is an fast and easy to use VNC viewer for Windows but it lacks any easily accessible option to save remote desktop session passwords for instant one-click login to remote sessions. Thankfully, UltraVNC supports saving session passwords and the feature can be activated as shown ahead.

While it's a better idea to allocate an static or fixed IP address to your Raspberry Pi, here is a simple trick to find the DHCP allocated IP address to your RasPi on a network. This specially come handy when you are trying to connect to RasPi remotely via SSH or VNC and don't know the dynamic IP it is currently active on.