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如何卸载Program Files(x86)误装程序并重装至64位Program Files

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算力阿峰
2026-8-4
自动卸载64位系统中Program Files(x86)里的旧版本InnoSetup程序

问题背景

我用InnoSetup制作的安装包默认将程序安装到Program Files(x86)目录，已错误分发该版本，大量64位Windows用户的软件都安装在这个x86目录中。

新版本安装包已调整为在64位系统下正确安装至Program Files目录，但旧版本并未自动卸载，仍留存于Program Files(x86)，需要实现自动卸载旧版本的功能。

旧版本安装脚本（64位系统仍安装到Program Files(x86)） 

; Script generated by the Inno Setup Script Wizard.
; SEE THE DOCUMENTATION FOR DETAILS ON CREATING INNO SETUP SCRIPT FILES!

#define MyAppName "testApp"
#define MyAppVersion "1.00"
#define MyAppPublisher "taichi"
#define MyAppURL "https://testApp.com/"
#define MyAppExeName "testApp.exe"

[Setup]
; NOTE: The value of AppId uniquely identifies this application. Do not use the same AppId value in installers for other applications.
; (To generate a new GUID, click Tools | Generate GUID inside the IDE.)
AppId={{xxx-xxxx-xxxxx-xxx}
AppName={#MyAppName}
AppVersion={#MyAppVersion}
;AppVerName={#MyAppName} {#MyAppVersion}
AppPublisher={#MyAppPublisher}
AppPublisherURL={#MyAppURL}
AppSupportURL={#MyAppURL}
AppUpdatesURL={#MyAppURL}
DefaultDirName={autopf}\{#MyAppName}
DisableProgramGroupPage=yes
; Uncomment the following line to run in non administrative install mode (install for current user only.)
;PrivilegesRequired=lowest
OutputDir=C:\Users\taichi\Desktop
OutputBaseFilename=testAppSetup
Compression=lzma
SolidCompression=yes
WizardStyle=modern

[Code]

/////////////////////////////////////////////////////////////////////
function GetUninstallString(): String;
var
  sUnInstPath: String;
  sUnInstallString: String;
begin
  sUnInstPath := ExpandConstant('Software\Microsoft\Windows\CurrentVersion\Uninstall\{#emit SetupSetting("AppId")}_is1');
  sUnInstallString := '';
  if not RegQueryStringValue(HKLM, sUnInstPath, 'UninstallString', sUnInstallString) then
    RegQueryStringValue(HKCU, sUnInstPath, 'UninstallString', sUnInstallString);
  Result := sUnInstallString;
end;

/////////////////////////////////////////////////////////////////////
function IsUpgrade(): Boolean;
begin
  Result := (GetUninstallString() <> '');
end;

/////////////////////////////////////////////////////////////////////
function UnInstallOldVersion(): Integer;
var
  sUnInstallString: String;
  iResultCode: Integer;
begin
// Return Values:
// 1 - uninstall string is empty
// 2 - error executing the UnInstallString
// 3 - successfully executed the UnInstallString

  // default return value
  Result := 0;

  // get the uninstall string of the old app
  sUnInstallString := GetUninstallString();
  if sUnInstallString <> '' then begin
    sUnInstallString := RemoveQuotes(sUnInstallString);
    if Exec(sUnInstallString, '/SILENT /NORESTART /SUPPRESSMSGBOXES','', SW_HIDE, ewWaitUntilTerminated, iResultCode) then
      Result := 3
    else
      Result := 2;
  end else
    Result := 1;
end;

/////////////////////////////////////////////////////////////////////
procedure CurStepChanged(CurStep: TSetupStep);
begin
  if (CurStep=ssInstall) then
  begin
    if (IsUpgrade()) then
    begin
      UnInstallOldVersion();
    end;
  end;
end;

[Languages]
Name: "english"; MessagesFile: "compiler:Default.isl"
[Tasks]
Name: "desktopicon"; Description: "{cm:CreateDesktopIcon}"; GroupDescription: "{cm:AdditionalIcons}"; Flags: unchecked

[Files]
Source: "C:\Users\taichi\Documents\hold\testAppDevelop\dist\testApp\testApp.exe"; DestDir: "{app}"; Flags: ignoreversion

[Icons]
Name: "{autoprograms}\{#MyAppName}"; Filename: "{app}\{#MyAppExeName}"
Name: "{autodesktop}\{#MyAppName}"; Filename: "{app}\{#MyAppExeName}"; Tasks: desktopicon

[Run]
Filename: "{app}\{#MyAppExeName}"; Description: "{cm:LaunchProgram,{#StringChange(MyAppName, '&', '&&')}}"; Flags: runasoriginaluser nowait postinstall skipifsilent

修改后的新版本脚本（可安装到Program Files，但旧版本未卸载） 

; Script generated by the Inno Setup Script Wizard.
; SEE THE DOCUMENTATION FOR DETAILS ON CREATING INNO SETUP SCRIPT FILES!

#define MyAppName "testApp"
#define MyAppVersion "1.00"
#define MyAppPublisher "taichi"
#define MyAppURL "https://testApp.com/"
#define MyAppExeName "testApp.exe"

[Setup]
; NOTE: The value of AppId uniquely identifies this application. Do not use the same AppId value in installers for other applications.
; (To generate a new GUID, click Tools | Generate GUID inside the IDE.)
AppId={{xxx-xxxx-xxxxx-xxx}
AppName={#MyAppName}
AppVersion={#MyAppVersion}
;AppVerName={#MyAppName} {#MyAppVersion}
AppPublisher={#MyAppPublisher}
AppPublisherURL={#MyAppURL}
AppSupportURL={#MyAppURL}
AppUpdatesURL={#MyAppURL}
DefaultDirName={autopf}\{#MyAppName}
DisableProgramGroupPage=yes
; Uncomment the following line to run in non administrative install mode (install for current user only.)
;PrivilegesRequired=lowest
OutputDir=C:\Users\taichi\Desktop
OutputBaseFilename=testAppSetup
Compression=lzma
SolidCompression=yes
WizardStyle=modern
ArchitecturesInstallIn64BitMode=x64
ArchitecturesAllowed=x64

[Code]

/////////////////////////////////////////////////////////////////////
function GetUninstallString(): String;
var
  sUnInstPath: String;
  sUnInstallString: String;
begin
  sUnInstPath := ExpandConstant('Software\Microsoft\Windows\CurrentVersion\Uninstall\{#emit SetupSetting("AppId")}_is1');
  sUnInstallString := '';
  if not RegQueryStringValue(HKLM, sUnInstPath, 'UninstallString', sUnInstallString) then
    RegQueryStringValue(HKCU, sUnInstPath, 'UninstallString', sUnInstallString);
  Result := sUnInstallString;
end;

function GetUninstallString32: string;
var
  sUnInstPath: string;
  sUnInstallString: String;
begin
  Result := '';
  sUnInstPath := ExpandConstant('Software\Microsoft\Windows\CurrentVersion\Uninstall\{{A227028A-40D7-4695-8BA9-41DF6A3895C7}_is1'); { Your App GUID/ID }
  sUnInstallString := '';
  if not RegQueryStringValue(HKLM32, sUnInstPath, 'UninstallString', sUnInstallString) then
    RegQueryStringValue(HKCU, sUnInstPath, 'UninstallString', sUnInstallString);
  Result := sUnInstallString;
end;

/////////////////////////////////////////////////////////////////////
function IsUpgrade(): Boolean;
begin
  Result := (GetUninstallString() <> '');
end;

function IsUpgrade32(): Boolean;
begin
  Result := (GetUninstallString32() <> '');
end;

/////////////////////////////////////////////////////////////////////
function UnInstallOldVersion(): Integer;
var
  sUnInstallString: String;
  iResultCode: Integer;
begin
// Return Values:
// 1 - uninstall string is empty
// 2 - error executing the UnInstallString
// 3 - successfully executed the UnInstallString

  // default return value
  Result := 0;

  // get the uninstall string of the old app
  sUnInstallString := GetUninstallString();
  if sUnInstallString <> '' then begin
    sUnInstallString := RemoveQuotes(sUnInstallString);
    if Exec(sUnInstallString, '/SILENT /NORESTART /SUPPRESSMSGBOXES','', SW_HIDE, ewWaitUntilTerminated, iResultCode) then
      Result := 3
    else
      Result := 2;
  end else
    Result := 1;
end;

function UnInstallOldVersion32(): Integer;
var
  sUnInstallString: String;
  iResultCode: Integer;
begin
// Return Values:
// 1 - uninstall string is empty
// 2 - error executing the UnInstallString
// 3 - successfully executed the UnInstallString

  // default return value
  Result := 0;

  sUnInstallString := GetUninstallString32();
  if sUnInstallString <> '' then begin
    sUnInstallString := RemoveQuotes(sUnInstallString);
    if Exec(sUnInstallString, '/SILENT /NORESTART /SUPPRESSMSGBOXES','', SW_HIDE, ewWaitUntilTerminated, iResultCode) then
      Result := 3
    else
      Result := 2;
  end else
    Result := 1;
end;

/////////////////////////////////////////////////////////////////////
procedure CurStepChanged(CurStep: TSetupStep);
begin
  if (CurStep=ssInstall) then
  begin
    if (IsUpgrade()) then
    begin
      UnInstallOldVersion();
    end;
  end;
  begin
    UnInstallOldVersion32();
  end;
end;

[Languages]
Name: "english"; MessagesFile: "compiler:Default.isl"

[Tasks]
Name: "desktopicon"; Description: "{cm:CreateDesktopIcon}"; GroupDescription: "{cm:AdditionalIcons}"; Flags: unchecked

[Files]
Source: "C:\Users\taichi\Documents\hold\testAppDevelop\dist\testApp\testApp.exe"; DestDir: "{app}"; Flags: ignoreversion

[Icons]
Name: "{autoprograms}\{#MyAppName}"; Filename: "{app}\{#MyAppExeName}"
Name: "{autodesktop}\{#MyAppName}"; Filename: "{app}\{#MyAppExeName}"; Tasks: desktopicon

[Run]
Filename: "{app}\{#MyAppExeName}"; Description: "{cm:LaunchProgram,{#StringChange(MyAppName, '&', '&&')}}"; Flags: runasoriginaluser nowait postinstall skipifsilent

解决方案及修正后的脚本

你的新版本脚本存在两个关键问题：一是硬编码了32位卸载路径的GUID，二是卸载逻辑的执行时机和条件判断错误。以下是修正后的完整脚本：

; Script generated by the Inno Setup Script Wizard.
; SEE THE DOCUMENTATION FOR DETAILS ON CREATING INNO SETUP SCRIPT FILES!

#define MyAppName "testApp"
#define MyAppVersion "1.00"
#define MyAppPublisher "taichi"
#define MyAppURL "https://testApp.com/"
#define MyAppExeName "testApp.exe"

[Setup]
; NOTE: 修正AppId格式，补上缺失的闭合大括号
AppId={{xxx-xxxx-xxxxx-xxx}}
AppName={#MyAppName}
AppVersion={#MyAppVersion}
AppPublisher={#MyAppPublisher}
AppPublisherURL={#MyAppURL}
AppSupportURL={#MyAppURL}
AppUpdatesURL={#MyAppURL}
DefaultDirName={autopf}\{#MyAppName}
DisableProgramGroupPage=yes
OutputDir=C:\Users\taichi\Desktop
OutputBaseFilename=testAppSetup
Compression=lzma
SolidCompression=yes
WizardStyle=modern
ArchitecturesInstallIn64BitMode=x64
ArchitecturesAllowed=x64

[Code]

/////////////////////////////////////////////////////////////////////
; 获取64位程序的卸载字符串
function GetUninstallString64(): String;
var
  sUnInstPath: String;
  sUnInstallString: String;
begin
  sUnInstPath := ExpandConstant('Software\Microsoft\Windows\CurrentVersion\Uninstall\{#emit SetupSetting("AppId")}_is1');
  sUnInstallString := '';
  if not RegQueryStringValue(HKLM, sUnInstPath, 'UninstallString', sUnInstallString) then
    RegQueryStringValue(HKCU, sUnInstPath, 'UninstallString', sUnInstallString);
  Result := sUnInstallString;
end;

; 获取32位程序的卸载字符串（64位系统中对应Wow6432Node分支）
function GetUninstallString32(): String;
var
  sUnInstPath: String;
  sUnInstallString: String;
begin
  sUnInstPath := ExpandConstant('Software\Microsoft\Windows\CurrentVersion\Uninstall\{#emit SetupSetting("AppId")}_is1');
  sUnInstallString := '';
  ; 先检查HKLM32（全局安装的32位程序）
  if not RegQueryStringValue(HKLM32, sUnInstPath, 'UninstallString', sUnInstallString) then
    ; 再检查HKCU32（当前用户安装的32位程序）
    RegQueryStringValue(HKCU32, sUnInstPath, 'UninstallString', sUnInstallString);
  Result := sUnInstallString;
end;

/////////////////////////////////////////////////////////////////////
function Has64BitVersion(): Boolean;
begin
  Result := (GetUninstallString64() <> '');
end;

function Has32BitVersion(): Boolean;
begin
  Result := (GetUninstallString32() <> '');
end;

/////////////////////////////////////////////////////////////////////
; 卸载64位旧版本
function UninstallOld64Version(): Integer;
var
  sUnInstallString: String;
  iResultCode: Integer;
begin
  Result := 0;
  sUnInstallString := GetUninstallString64();
  if sUnInstallString <> '' then begin
    sUnInstallString := RemoveQuotes(sUnInstallString);
    if Exec(sUnInstallString, '/SILENT /NORESTART /SUPPRESSMSGBOXES','', SW_HIDE, ewWaitUntilTerminated, iResultCode) then
      Result := 3
    else
      Result := 2;
  end else
    Result := 1;
end;

; 卸载32位旧版本
function UninstallOld32Version(): Integer;
var
  sUnInstallString: String;
  iResultCode: Integer;
begin
  Result := 0;
  sUnInstallString := GetUninstallString32();
  if sUnInstallString <> '' then begin
    sUnInstallString := RemoveQuotes(sUnInstallString);
    if Exec(sUnInstallString, '/SILENT /NORESTART /SUPPRESSMSGBOXES','', SW_HIDE, ewWaitUntilTerminated, iResultCode) then
      Result := 3
    else
      Result := 2;
  end else
    Result := 1;
end;

/////////////////////////////////////////////////////////////////////
; 在安装准备阶段执行卸载，避免文件冲突
procedure CurStepChanged(CurStep: TSetupStep);
begin
  if CurStep = ssPrepare then
  begin
    ; 先卸载32位旧版本
    if Has32BitVersion() then
    begin
      UninstallOld32Version();
    end;
    ; 再卸载64位旧版本（如果存在）
    if Has64BitVersion() then
    begin
      UninstallOld64Version();
    end;
  end;
end;

[Languages]
Name: "english"; MessagesFile: "compiler:Default.isl"

[Tasks]
Name: "desktopicon"; Description: "{cm:CreateDesktopIcon}"; GroupDescription: "{cm:AdditionalIcons}"; Flags: unchecked

[Files]
Source: "C:\Users\taichi\Documents\hold\testAppDevelop\dist\testApp\testApp.exe"; DestDir: "{app}"; Flags: ignoreversion

[Icons]
Name: "{autoprograms}\{#MyAppName}"; Filename: "{app}\{#MyAppExeName}"
Name: "{autodesktop}\{#MyAppName}"; Filename: "{app}\{#MyAppExeName}"; Tasks: desktopicon

[Run]
Filename: "{app}\{#MyAppExeName}"; Description: "{cm:LaunchProgram,{#StringChange(MyAppName, '&', '&&')}}"; Flags: runasoriginaluser nowait postinstall skipifsilent

关键修改说明

  1. 修正AppId格式：原脚本中AppId={{xxx-xxxx-xxxxx-xxx}缺少闭合大括号，导致注册表路径识别错误，修正为AppId={{xxx-xxxx-xxxxx-xxx}}。
  2. 动态获取32位卸载路径：不再硬编码GUID，而是用{#emit SetupSetting("AppId")}动态获取当前脚本的AppId，保证和旧版本的卸载注册表项匹配。
  3. **
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最近更新时间：2026.08.04 12:27:51