diff --git a/.changes/store-main-binary-name.md b/.changes/store-main-binary-name.md
new file mode 100644
index 000000000000..fff3fb793b53
--- /dev/null
+++ b/.changes/store-main-binary-name.md
@@ -0,0 +1,6 @@
+---
+"tauri-bundler": "patch:feat"
+---
+
+Store main binary name in registry for NSIS installer and delete old main binary on updates if the name changes.
+
diff --git a/Cargo.lock b/Cargo.lock
index 9e0825f8de65..c573557e5bee 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -7120,6 +7120,7 @@ dependencies = [
  "thiserror",
  "time",
  "ureq",
+ "url",
  "uuid",
  "walkdir",
  "windows-registry",
diff --git a/crates/tauri-bundler/src/bundle/windows/msi/wix.rs b/crates/tauri-bundler/src/bundle/windows/msi/wix.rs
index 362ca1ff87f1..2fcc2580ac37 100644
--- a/crates/tauri-bundler/src/bundle/windows/msi/wix.rs
+++ b/crates/tauri-bundler/src/bundle/windows/msi/wix.rs
@@ -540,8 +540,9 @@ pub fn build_wix_app_installer(
   let shortcut_guid = generate_package_guid(settings).to_string();
   data.insert("shortcut_guid", to_json(shortcut_guid.as_str()));
 
-  let app_exe_name = settings.main_binary_name().to_string();
-  data.insert("app_exe_name", to_json(app_exe_name));
+  // Note: `main_binary_name` is not used in our template but we keep it as it is potentially useful for custom temples
+  let main_binary_name = settings.main_binary_name().to_string();
+  data.insert("main_binary_name", to_json(&main_binary_name));
 
   let binaries = generate_binaries_data(settings)?;
 
diff --git a/crates/tauri-bundler/src/bundle/windows/templates/installer.nsi b/crates/tauri-bundler/src/bundle/windows/templates/installer.nsi
index c6e728c66dde..35cede30caad 100644
--- a/crates/tauri-bundler/src/bundle/windows/templates/installer.nsi
+++ b/crates/tauri-bundler/src/bundle/windows/templates/installer.nsi
@@ -637,6 +637,15 @@ Section Install
     WriteRegStr SHCTX "${UNINSTKEY}" $MultiUser.InstallMode 1
   !endif
 
+  ; Remove old main binary if it doesn't match new main binary name
+  ReadRegStr $0 SHCTX "${UNINSTKEY}" "MainBinaryName"
+  ${If} $0 != "${MAINBINARYNAME}.exe"
+    Delete "$INSTDIR\$0"
+  ${EndIf}
+
+  ; Save current MAINBINARYNAME for future updates
+  WriteRegStr SHCTX "${UNINSTKEY}" "MainBinaryName" "${MAINBINARYNAME}.exe"
+
   ; Registry information for add/remove programs
   WriteRegStr SHCTX "${UNINSTKEY}" "DisplayName" "${PRODUCTNAME}"
   WriteRegStr SHCTX "${UNINSTKEY}" "DisplayIcon" "$\"$INSTDIR\${MAINBINARYNAME}.exe$\""