免費激活這事可能還是直接升級的更保險，因為一般來說升級之前的系統都是激活好了的，雖然大家激活系統方式可謂“條條大路通羅馬”吧，但微軟一般也沒計較什麼，都給予了激活狀態的Win10。不過使用全新安裝再輸入產品密鑰的方式可能更適合正版用戶，或者自己手中有合法密鑰（至少密鑰沒被封禁）的用戶。如果你能夠確認手中的密鑰沒有問題，不妨嘗試一下IT之家的方法。操作上很簡單，只需要把如下代碼使用記事本等保存為.vbs格式（文件名自擬），雙擊運行即可，適用於Win7/Win8.1/Win10系統。
如上圖所示，把以下代碼保存到文本檔並將擴展名改成.vbs然後雙擊即可！
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Option Explicit
Dim objshell,path,DigitalID, Result
Set objshell = CreateObject("WScript.Shell")
'Set registry key path
Path = "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\"
'Registry key value
DigitalID = objshell.RegRead(Path & "DigitalProductId")
Dim ProductName,ProductID,ProductKey,ProductData
'Get ProductName, ProductID, ProductKey
ProductName = "系統名稱：" & objshell.RegRead(Path & "ProductName")
ProductID = "產品ID：" & objshell.RegRead(Path & "ProductID")
ProductKey = "已安裝密鑰：" & ConvertToKey(DigitalID)
ProductData = ProductName & vbNewLine & ProductID & vbNewLine & ProductKey
'Show messbox if save to a file
If vbYes = MsgBox(ProductData & vblf & vblf & "要將密鑰保存到文件嗎？", vbYesNo + vbQuestion, "Windows密鑰信息") then
Save ProductData
End If
'Convert binary to chars
Function ConvertToKey(Key)
Const KeyOffset = 52
Dim isWin10, Maps, i, j, Current, KeyOutput, Last, keypart1, insert
'Check if OS is Windows 10
isWin10 = (Key(66) \ 6) And 1
Key(66) = (Key(66) And &HF7) Or ((isWin10 And 2) * 4)
i = 24
Maps = "BCDFGHJKMPQRTVWXY2346789"
Do
Current= 0
j = 14
Do
Current = Current* 256
Current = Key(j + KeyOffset) + Current
Key(j + KeyOffset) = (Current \ 24)
Current=Current Mod 24
j = j -1
Loop While j >= 0
i = i -1
KeyOutput = Mid(Maps,Current+ 1, 1) & KeyOutput
Last = Current
Loop While i >= 0
If (isWin10 = 1) Then
keypart1 = Mid(KeyOutput, 2, Last)
insert = "N"
KeyOutput = Replace(KeyOutput, keypart1, keypart1 & insert, 2, 1, 0)
If Last = 0 Then KeyOutput = insert & KeyOutput
End If
ConvertToKey = Mid(KeyOutput, 1, 5) & "-" & Mid(KeyOutput, 6, 5) & "-" & Mid(KeyOutput, 11, 5) & "-" & Mid(KeyOutput, 16, 5) & "-" & Mid(KeyOutput, 21, 5)
End Function
'Save data to a file
Function Save(Data)
Dim fso, fName, txt,objshell,UserName
Set objshell = CreateObject("wscript.shell")
'Get current user name
UserName = objshell.ExpandEnvironmentStrings("%UserName%")
'Create a text file on desktop
fName = "C:\Users\" & UserName & "\Desktop\Windows密鑰備份.txt"
Set fso = CreateObject("Scripting.FileSystemObject")
Set txt = fso.CreateTextFile(fName)
txt.Writeline Data
txt.Close
End Function
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復制以上代碼，即可一件備份當前系統的激活碼了
