From ComputerWorld:
http://www.computerworld.com/article/2984729/microsoft-windows/windows-10-the-stealth-os.html "It all started when an Inquirer reader found, hiding in the hidden directory $Windows.~BT on his PC, all of the Windows 10 installation files, even though he had not “reserved” a copy. Up to 6GB worth of them."
If you were unaware of this, or running a small ssd or wondering why your internet is lagging and are
not interested (@ this time) downloading Win10, shame on them. lol.
If you are looking for the 'new' update .. upgrade ... Version 1511 .. you can get it here:
https://www.microsoft.com/en-us/software-download/windows10 Click upgrade Now .. (I did this, painless.)
https://rog.asus.com/forum/showthread.php?78811-W10-V1511-10586-Install&p=550976&viewfull=1#post5509... Best of Luck. .c.