You will free see the Windows 8.1 upgrade screen.
Then you click the Download.
In Malaysia 2Mb/sec line it took 3 hours to download.
It took another 3 hours to run the upgrade. After the download it will start the installation.
After Applying the PC setting then Setting up few more things.
You think it is done? Not yet because of Taking care of few things.
Well, finally but Oops Getting your apps ready.
It is still not yet done because it is Almost done.
Do not need to worry if your upgrade is spending less than 7 hours.