diff --git a/afterInstall.ps1 b/afterInstall.ps1
new file mode 100644
index 0000000..fcaf232
--- /dev/null
+++ b/afterInstall.ps1
@@ -0,0 +1,297 @@
+# ================================
+# CONFIGURATION
+# ================================
+$AppName   = "welsonjs"
+$TargetDir = Join-Path $env:APPDATA $AppName
+$TmpDir    = Join-Path $env:TEMP    "$AppName-downloads"
+
+Write-Host ""
+Write-Host "[*] Target directory   : $TargetDir"
+Write-Host "[*] Temporary directory: $TmpDir"
+Write-Host ""
+
+# Ensure base directories exist
+New-Item -ItemType Directory -Path $TargetDir -Force | Out-Null
+New-Item -ItemType Directory -Path $TmpDir    -Force | Out-Null
+
+
+# ================================
+# ARCHITECTURE DETECTION
+# ================================
+$arch = "x86"
+if ($env:PROCESSOR_ARCHITECTURE -eq "AMD64") { $arch = "x64" }
+elseif ($env:PROCESSOR_ARCHITECTURE -eq "ARM64") { $arch = "arm64" }
+if ($env:PROCESSOR_ARCHITEW6432) { $arch = "x64" }
+
+Write-Host "[*] Detected architecture: $arch"
+Write-Host ""
+
+
+# ================================
+# HELPER FUNCTIONS
+# ================================
+
+function Ensure-EmptyDirectory {
+    param(
+        [Parameter(Mandatory=$true)]
+        [string]$Path
+    )
+
+    # If a file exists at the path, remove it
+    if (Test-Path $Path -PathType Leaf) {
+        Write-Host "[WARN] A file exists at path '$Path'. Deleting it..."
+        Remove-Item -Path $Path -Force
+    }
+
+    # Ensure directory exists
+    if (-not (Test-Path $Path -PathType Container)) {
+        Write-Host "[*] Creating directory: $Path"
+        New-Item -ItemType Directory -Path $Path -Force | Out-Null
+    }
+}
+
+function Download-File {
+    param(
+        [Parameter(Mandatory=$true)]
+        [string]$Url,
+        [Parameter(Mandatory=$true)]
+        [string]$Destination
+    )
+
+    Write-Host "[*] Downloading file..."
+    Write-Host "    URL : $Url"
+    Write-Host "    OUT : $Destination"
+
+    try {
+        Invoke-WebRequest -Uri $Url -OutFile $Destination -UseBasicParsing -ErrorAction Stop
+        Write-Host "[OK] Download completed."
+        Write-Host ""
+    }
+    catch {
+        Write-Host "[ERROR] Failed to download: $Url"
+        Write-Host $_.Exception.Message
+        throw
+    }
+}
+
+function Extract-Zip {
+    param(
+        [Parameter(Mandatory=$true)]
+        [string]$ZipPath,
+        [Parameter(Mandatory=$true)]
+        [string]$DestDir
+    )
+
+    Write-Host "[*] Extracting ZIP:"
+    Write-Host "    $ZipPath"
+    Write-Host "    -> $DestDir"
+
+    # Make sure destination directory exists and is a directory
+    Ensure-EmptyDirectory -Path $DestDir
+
+    # Temporary extraction folder inside destination
+    $TmpExtract = Join-Path $DestDir "__tmp_extract__"
+    Ensure-EmptyDirectory -Path $TmpExtract
+
+    Write-Host "[DEBUG] PowerShell command:"
+    Write-Host "        Expand-Archive -LiteralPath `"$ZipPath`" -DestinationPath `"$TmpExtract`" -Force"
+
+    try {
+        Expand-Archive -LiteralPath $ZipPath -DestinationPath $TmpExtract -Force -ErrorAction Stop
+    }
+    catch {
+        Write-Host "[ERROR] Failed to extract ZIP with Expand-Archive: $ZipPath"
+        Write-Host $_.Exception.Message
+        throw
+    }
+
+    # Check extracted entries
+    $entries = Get-ChildItem -LiteralPath $TmpExtract
+
+    if (-not $entries -or $entries.Count -eq 0) {
+        Write-Host "[ERROR] No entries were extracted from ZIP: $ZipPath"
+        throw "ZIP appears to be empty or extraction failed."
+    }
+
+    if ($entries.Count -eq 1 -and $entries[0].PSIsContainer) {
+        Write-Host "[*] Detected single root directory inside ZIP. Flattening..."
+
+        # Move children of the single root directory into destination
+        $innerItems = Get-ChildItem -LiteralPath $entries[0].FullName
+        foreach ($item in $innerItems) {
+            Move-Item -LiteralPath $item.FullName -Destination $DestDir -Force
+        }
+    }
+    else {
+        Write-Host "[*] ZIP has multiple top-level entries. Copying all..."
+
+        foreach ($item in $entries) {
+            Move-Item -LiteralPath $item.FullName -Destination $DestDir -Force
+        }
+    }
+
+    # Clean up temp extraction folder
+    Remove-Item -LiteralPath $TmpExtract -Recurse -Force
+
+    Write-Host "[OK] ZIP extraction completed."
+    Write-Host ""
+}
+
+function Extract-TarGz {
+    param(
+        [Parameter(Mandatory=$true)]
+        [string]$TarGzPath,
+        [Parameter(Mandatory=$true)]
+        [string]$DestDir
+    )
+
+    Write-Host "[*] Extracting TAR.GZ:"
+    Write-Host "    $TarGzPath"
+    Write-Host "    -> $DestDir"
+
+    Ensure-EmptyDirectory -Path $DestDir
+
+    # Modern Windows ships with tar, but we validate its presence
+    $tarCmd = Get-Command tar -ErrorAction SilentlyContinue
+    if (-not $tarCmd) {
+        Write-Host "[ERROR] 'tar' command not found. Cannot extract TAR.GZ."
+        throw "tar command not found."
+    }
+
+    Write-Host "[DEBUG] tar command:"
+    Write-Host "        tar -xzf `"$TarGzPath`" -C `"$DestDir`""
+
+    try {
+        & tar -xzf "$TarGzPath" -C "$DestDir"
+        if ($LASTEXITCODE -ne 0) {
+            throw "tar exit code $LASTEXITCODE"
+        }
+        Write-Host "[OK] TAR.GZ extraction completed."
+        Write-Host ""
+    }
+    catch {
+        Write-Host "[ERROR] Failed to extract TAR.GZ: $TarGzPath"
+        Write-Host $_.Exception.Message
+        throw
+    }
+}
+
+
+# ================================
+# SET DOWNLOAD URLS BASED ON ARCH
+# ================================
+$PythonUrl = $null
+$CurlUrl   = $null
+$YaraUrl   = $null
+$WamrUrl   = $null
+
+switch ($arch) {
+    "x64" {
+        # Python embeddable (x64)
+        $PythonUrl = "https://www.python.org/ftp/python/3.13.9/python-3.13.9-embeddable-amd64.zip"
+
+        # curl (x64, mingw)
+        $CurlUrl   = "https://curl.se/windows/latest.cgi?p=win64-mingw.zip"
+
+        # YARA (x64, GitHub — as you specified)
+        $YaraUrl   = "https://github.com/VirusTotal/yara/releases/download/v4.5.5/yara-4.5.5-2368-win64.zip"
+
+        # WAMR (x64 only)
+        $WamrUrl   = "https://github.com/bytecodealliance/wasm-micro-runtime/releases/download/WAMR-2.4.3/iwasm-2.4.3-x86_64-windows-2022.tar.gz"
+    }
+
+    "arm64" {
+        # Python embeddable (ARM64)
+        $PythonUrl = "https://www.python.org/ftp/python/3.13.9/python-3.13.9-embeddable-arm64.zip"
+
+        # curl (ARM64)
+        $CurlUrl   = "https://curl.se/windows/latest.cgi?p=win64a-mingw.zip"
+
+        # DO NOT install YARA/WAMR on ARM64
+        $YaraUrl   = $null
+        $WamrUrl   = $null
+    }
+
+    default {
+        # Treat anything else as x86
+        # Python embeddable (x86)
+        $PythonUrl = "https://www.python.org/ftp/python/3.13.9/python-3.13.9-embeddable-win32.zip"
+
+        # curl (x86)
+        $CurlUrl   = "https://downloads.sourceforge.net/project/muldersoft/cURL/curl-8.17.0-win-x86-full.2025-11-09.zip";
+
+        # Do NOT install YARA/WAMR on x86 (same policy as before)
+        $YaraUrl   = $null
+        $WamrUrl   = $null
+    }
+}
+
+Write-Host "[*] Python URL: $PythonUrl"
+Write-Host "[*] curl URL  : $CurlUrl"
+if ($YaraUrl) {
+    Write-Host "[*] YARA URL : $YaraUrl"
+} else {
+    Write-Host "[*] YARA     : skipped on this architecture"
+}
+if ($WamrUrl) {
+    Write-Host "[*] WAMR URL : $WamrUrl"
+} else {
+    Write-Host "[*] WAMR     : skipped on this architecture"
+}
+Write-Host ""
+
+
+# ================================
+# DOWNLOAD FILES
+# ================================
+$PythonZip = Join-Path $TmpDir "python.zip"
+$CurlZip   = Join-Path $TmpDir "curl.zip"
+$YaraZip   = Join-Path $TmpDir "yara.zip"
+$WamrTgz   = Join-Path $TmpDir "wamr.tar.gz"
+
+try {
+    Download-File -Url $PythonUrl -Destination $PythonZip
+    Download-File -Url $CurlUrl   -Destination $CurlZip
+
+    if ($YaraUrl) {
+        Download-File -Url $YaraUrl -Destination $YaraZip
+    }
+
+    if ($WamrUrl) {
+        Download-File -Url $WamrUrl -Destination $WamrTgz
+    }
+}
+catch {
+    Write-Host "[FATAL] Download phase failed."
+    exit 1
+}
+
+
+# ================================
+# EXTRACT FILES
+# ================================
+try {
+    Extract-Zip -ZipPath $PythonZip -DestDir (Join-Path $TargetDir "python")
+    Extract-Zip -ZipPath $CurlZip   -DestDir (Join-Path $TargetDir "curl")
+
+    if ($YaraUrl) {
+        Extract-Zip -ZipPath $YaraZip -DestDir (Join-Path $TargetDir "yara")
+    }
+
+    if ($WamrUrl) {
+        Extract-TarGz -TarGzPath $WamrTgz -DestDir (Join-Path $TargetDir "wamr")
+    }
+}
+catch {
+    Write-Host "[FATAL] Extraction phase failed."
+    exit 1
+}
+
+
+# ================================
+# FINISH
+# ================================
+Write-Host "[*] All tools installed successfully."
+Write-Host "[*] Installed into: $TargetDir"
+Write-Host ""
+exit 0
diff --git a/lib/http.js b/lib/http.js
index 47605e9..cdebb6b 100644
--- a/lib/http.js
+++ b/lib/http.js
@@ -119,16 +119,21 @@ var HTTPObject = function(engine) {
         } else if (this.engine == "CURL") {
             this._interface = SHELL.create();
 
-            // the location of cURL binary
-            var arch = SYS.getArch();
-            if (arch.toLowerCase().indexOf("arm") > -1) {
-                this.setBinPath("bin\\arm64\\curl-" + this.curlVersion + "-win64a-mingw\\bin\\curl.exe");
-            } else if (arch.indexOf("64") > -1) {
-                this.setBinPath("bin\\x64\\curl-" + this.curlVersion + "-win64-mingw\\bin\\curl.exe");
+            // set cURL executable file location
+            var default_curl_path = SYS.getAppDataDir() + "\\curl\\curl.exe";
+            if (FILE.fileExists(default_curl_path)) {
+                this.setBinPath(default_curl_path);
             } else {
-                this.setBinPath("bin\\x86\\curl-" + this.curlVersion + "-win32-mingw\\bin\\curl.exe");
+                var arch = SYS.getArch();
+                if (arch.toLowerCase().indexOf("arm") > -1) {
+                    this.setBinPath("bin\\arm64\\curl-" + this.curlVersion + "-win64a-mingw\\bin\\curl.exe");
+                } else if (arch.indexOf("64") > -1) {
+                    this.setBinPath("bin\\x64\\curl-" + this.curlVersion + "-win64-mingw\\bin\\curl.exe");
+                } else {
+                    this.setBinPath("bin\\x86\\curl-" + this.curlVersion + "-win32-mingw\\bin\\curl.exe");
+                }
             }
-
+            
             // do not clear after calling the `exec`
             this._interface.setIsPreventClear(true);
         } else if (this.engine == "BITS") {
diff --git a/lib/ovftool.js b/lib/ovftool.js
index 311b6f0..679d542 100644
--- a/lib/ovftool.js
+++ b/lib/ovftool.js
@@ -1,16 +1,17 @@
 // ovftool.js
-// Copyright 2019-2025, Namhyeon Go <gnh1201@catswords.re.kr> and the WelsonJS contributors.
+// Namhyeon Go <gnh1201@catswords.re.kr> and the WelsonJS contributors.
 // SPDX-License-Identifier: GPL-3.0-or-later
 // https://github.com/gnh1201/welsonjs
 // 
 // Download OVFTool (Open Virtualization Format (OVF) Tool):
 // https://developer.broadcom.com/tools/open-virtualization-format-ovf-tool/latest
 //
+var SYS = require("lib/system");
 var SHELL = require("lib/shell");
 var CRED = require("lib/credentials");
 
 function OVFObject() {
-    this.binPath = "bin\\x64\\VMware-ovftool-4.6.3-24031167-win.x86_64\\ovftool\\ovftool.exe";
+    this.binPath = SYS.getAppDataDir() + "\\ovftool\\ovftool.exe";
     this.hostname = "";
     this.port = 443;
     this.resourceName = "";
@@ -66,7 +67,7 @@ function create() {
 exports.setCredential = setCredential;
 exports.create = create;
 
-exports.VERSIONINFO = "Broadcom/VMware OVF Tool interface (ovftool.js) version 0.1.2";
+exports.VERSIONINFO = "Broadcom/VMware OVF Tool interface (ovftool.js) version 0.1.3";
 exports.AUTHOR = "gnh1201@catswords.re.kr";
 exports.global = global;
 exports.require = global.require;
diff --git a/lib/python3.js b/lib/python3.js
index 37635c0..5231bfe 100644
--- a/lib/python3.js
+++ b/lib/python3.js
@@ -13,13 +13,18 @@ function PythonObject() {
     this.version = "3.13.2";
 
     this.create = function() {
-        var arch = SYS.getArch();
-        if (arch.toLowerCase().indexOf("arm") > -1) {
-            this.setBinPath("bin\\arm64\\python-" + this.version + "-embed-arm64\\python.exe");
-        } else if (arch.indexOf("64") > -1) {
-            this.setBinPath("bin\\x64\\python-" + this.version + "-embed-amd64\\python.exe");
+        var default_python3_path = SYS.getAppDataDir() + "\\python\\python.exe";
+        if (FILE.fileExists(default_python3_path)) {
+            this.setBinPath(default_python3_path);
         } else {
-            this.setBinPath("bin\\x86\\python-" + this.version + "-embed-win32\\python.exe");
+            var arch = SYS.getArch();
+            if (arch.toLowerCase().indexOf("arm") > -1) {
+                this.setBinPath("bin\\arm64\\python-" + this.version + "-embed-arm64\\python.exe");
+            } else if (arch.indexOf("64") > -1) {
+                this.setBinPath("bin\\x64\\python-" + this.version + "-embed-amd64\\python.exe");
+            } else {
+                this.setBinPath("bin\\x86\\python-" + this.version + "-embed-win32\\python.exe");
+            }
         }
     };
     
@@ -57,6 +62,6 @@ exports.execScript = function(scriptName, args) {
     return (new PythonObject()).execScript(scriptName, args);
 };
 
-exports.VERSIONINFO = "Python Interface (python3.js) version 0.2.1";
+exports.VERSIONINFO = "Python Interface (python3.js) version 0.2.2";
 exports.global = global;
 exports.require = global.require;
diff --git a/lib/system.js b/lib/system.js
index 37f8a0f..cd4fb90 100644
--- a/lib/system.js
+++ b/lib/system.js
@@ -37,6 +37,10 @@ function getEnvString(envName) {
     })(envName.toUpperCase());
 }
 
+function getAppDataDir() {
+    return getEnvString("APPDATA") + "\\WelsonJS";
+}
+
 function get32BitFolder() {
     var base = getEnvString("WINDIR");
     var syswow64 = base + "\\SysWOW64\\";
@@ -198,6 +202,7 @@ function getProcessVersion() {
 
 exports.createProcess = createProcess;
 exports.getEnvString = getEnvString;
+exports.getAppDataDir = getAppDataDir;
 exports.get32BitFolder = get32BitFolder;
 exports.isElevated = isElevated;
 exports.getOS = getOS;
@@ -219,6 +224,6 @@ exports.createShortcut = createShortcut;
 exports.ping = ping;
 exports.getProcessVersion = getProcessVersion;
 
-exports.VERSIONINFO = "System Module (system.js) version 0.1.5";
+exports.VERSIONINFO = "System Module (system.js) version 0.1.6";
 exports.global = global;
 exports.require = global.require;
diff --git a/lib/wamr.js b/lib/wamr.js
index 83d2573..0e3b550 100644
--- a/lib/wamr.js
+++ b/lib/wamr.js
@@ -1,15 +1,16 @@
 // wamr.js
-// Copyright 2019-2025, Namhyeon Go <gnh1201@catswords.re.kr> and the WelsonJS contributors.
+// Namhyeon Go <gnh1201@catswords.re.kr> and the WelsonJS contributors.
 // SPDX-License-Identifier: GPL-3.0-or-later
 // https://github.com/gnh1201/welsonjs
 // 
-// WAMR(WebAssembly Micro Runtime) integration for WelsonJS framework
+// WAMR(WebAssembly Micro Runtime) integration
 // https://github.com/bytecodealliance/wasm-micro-runtime
 // 
+var SYS = require("lib/system");
 var SHELL = require("lib/shell");
 
 var WAMRObject = function() {
-	this.binPath = "bin\\iwasm";
+	this.binPath = SYS.getAppDataDir() + "\\wamr\\iwasm.exe";
 
     this.verbose = 0;
     this.stackSize = 0;
@@ -60,3 +61,7 @@ var WAMRObject = function() {
 exports.create = function() {
     return new WAMRObject();
 };
+
+exports.VERSIONINFO = "WAMR(WebAssembly Micro Runtime) integration (wamr.js) version 0.1.1";
+exports.global = global;
+exports.require = global.require;
diff --git a/setup.iss b/setup.iss
index 205ea96..51fc7e9 100644
--- a/setup.iss
+++ b/setup.iss
@@ -84,6 +84,7 @@ Name: "{group}\Uninstall {cm:AppName}"; Filename: "{uninstallexe}"; AfterInstall
 ; Filename: {app}\bin\gtk2-runtime-2.24.33-2021-01-30-ts-win64.exe;
 ; Filename: {app}\bin\nmap-7.92\VC_redist.x86.exe;
 ; Filename: {app}\bin\nmap-7.92\npcap-1.50.exe;
+Filename: "powershell.exe"; Parameters: "-ExecutionPolicy Bypass -NoProfile -File ""{app}\afterInstall.ps1"""; WorkingDir: "{app}"; Flags: nowait
 Filename: {app}\installService.bat; Flags: nowait
 Filename: {app}\bin\x86\WelsonJS.Launcher.exe; Flags: nowait