Some Tips or Good Practice in Windows Clean Installation

These tricks I learn along the way, especially during the frequent clean installations I have to do as Windows 10 Tech Preview insider.
   Do not forget to copy a text file containing these in the Windows installation flash disk that you've just created with Rufus or YUMI:
~ Windows product key,
~ This .NET 3.5 feature offline activation command line (change f with your flash disk drive location),

DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:f:\sources\sxs

   You can then look up the product key during Windows installation by bringing up the Command Prompt window with Shift + F10 and just copy-paste it, saving you a lot of work typing it manually. And do remember the shortcut combo: Shift + F10.

   You can read the content of the text file using this command:

type <text file title>.txt

   The new copy-paste support in Windows 10 will make your copy-pasting easier. In the old versions you have to do it from the windows handle menu (top-left).

   The DISM command line will become handy after the Windows first run and some of your old device drivers won't install unless your Windows has .NET 3.5:
1. Just open Command Prompt (Admin),
2. copy-paste the above command,
3. change the drive letter according to where your flash disk is,
4. and Enter.

   It's so easy, right?[]

Update Jan 4, 2014:
   Always partitioned your hard drive at least into 2 partitions:
~ first partition (usually drive C:) for Windows and all applications, and
~ second partition (usually drive D:) for your data.
  Use 30:70 (C drive size : D drive size) proportion for work/design/video processing computer, but 70:30 for gaming computer.
   Move all default folders (Documents, Music, Videos, etc.) to your data partition like described here.
   Don't forget to pull out your Windows installation flash disk when you see this screen,

so that Windows will assign drive D: to your second partition, instead of the Windows installation flash disk—and later any removable drive you plugged into the USB port.

Update Jan 18, 2015: Don't forget to backup your "license"/activation using Microsoft Toolkit or Advanced Tokens Manager. It'll come handy when you don't have Internet access and you have to reinstall your messed up Tech Preview build—like I did last week :)[]