免费激活这事可能还是直接升级的更保险，因为一般来说升级之前的系统都是激活好了的，虽然大家激活系统方式可谓“条条大路通罗马”吧，但微软一般也没计较什么，都给予了激活状态的Win10。不过使用全新安装再输入产品密钥的方式可能更适合正版用户，或者自己手中有合法密钥（至少密钥没被封禁）的用户。如果你能够确认手中的密钥没有问题，不妨尝试一下IT之家的方法。操作上很简单，只需要把如下代码使用记事本等保存为.vbs格式（文件名自拟），双击运行即可，适用于Win7/Win8.1/Win10系统。

如上图所示，把以下代码保存到文本档并将扩展名改成.vbs然后双击即可！

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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 = "系统名称：" & objshell.RegRead(Path & "ProductName")

ProductID = "产品ID：" & objshell.RegRead(Path & "ProductID")

ProductKey = "已安装密钥：" & ConvertToKey(DigitalID)

ProductData = ProductName & vbNewLine & ProductID & vbNewLine & ProductKey

'Show messbox if save to a file

If vbYes = MsgBox(ProductData & vblf & vblf & "要将密钥保存到文件吗？", vbYesNo + vbQuestion, "Windows密钥信息") 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密钥备份.txt"

Set fso = CreateObject("Scripting.FileSystemObject")

Set txt = fso.CreateTextFile(fName)

txt.Writeline Data

txt.Close

End Function

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复制以上代码，即可一件备份当前系统的激活码了！

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