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dextermat :
If you upgrade you should do this :
1- backup your data and windows 7/8/8.1 key (use produid or other program)
2- do the windows 10 upgrade
3- do a iso of windows 10 ==> if you want clean install
4- reinstall from the iso just created
if you upgrade, you don't need a windows 10 key, it bound to mobo
source http://lifehacker.com/how-to-do-a-clean-install-of-windows-10-1720775893
you can get all iso (upgrade or clean install here https://www.microsoft.com/en-us/software-download/windows10ISO)
source http://www.tomshardware.com/news/download-windows-10,29702.html
1- backup your data and windows 7/8/8.1 key (use produid or other program)
2- do the windows 10 upgrade
3- do a iso of windows 10 ==> if you want clean install
4- reinstall from the iso just created
if you upgrade, you don't need a windows 10 key, it bound to mobo
source http://lifehacker.com/how-to-do-a-clean-install-of-windows-10-1720775893
you can get all iso (upgrade or clean install here https://www.microsoft.com/en-us/software-download/windows10ISO)
source http://www.tomshardware.com/news/download-windows-10,29702.html
Just a tip, after upgrading to Win 10 from a Win7/8 install, you can use a key finder to get your Windows 10 key.
For those who don`t want to install a key finder you can use this VBS script, copy the code into a text file and rename it to .vbs and run it.
Set WshShell = WScript.CreateObject("WScript.Shell")
KeyPath = "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\DigitalProductId"
MsgBox ExtractKey(WshShell.RegRead(KeyPath))
Function ExtractKey(KeyInput)
Const KeyOffset = 52
i = 28
CharWhitelist = "BCDFGHJKMPQRTVWXY2346789"
Do
Cur = 0
x = 14
Do
Cur = Cur * 256
Cur = KeyInput(x + KeyOffset) + Cur
KeyInput(x + KeyOffset) = (Cur \ 24) And 255
Cur = Cur Mod 24
x = x -1
Loop While x >= 0
i = i -1
KeyOutput = Mid(CharWhitelist, Cur + 1, 1) & KeyOutput
If (((29 - i) Mod 6) = 0) And (i <> -1) Then
i = i -1
KeyOutput = "-" & KeyOutput
End If
Loop While i >= 0
ExtractKey = KeyOutput
End Function
http://www.expertreviews.co.uk/software/operating-systems/1403593/how-to-upgrade-to-windows-10-and-get-your-new-licence-key