diff --git a/installer/installer.nsi b/installer/installer.nsi
index a25f76be..17235d24 100644
--- a/installer/installer.nsi
+++ b/installer/installer.nsi
@@ -181,12 +181,6 @@ Function .onInit
 			Abort
 	${EndIf}
 
-	; Currently, we're not able to support Windows xp since it has an incomplete TSF.
-	${IfNot} ${AtLeastWinVista}
-		MessageBox MB_ICONSTOP|MB_OK $(AtLeastWinVista_MESSAGE)
-		Quit
-	${EndIf}
-
 	; The installer is an x86 (32-bit) binary. On 64-bit Windows (x64 and ARM64),
 	; the WOW64 subsystem automatically redirects all registry writes to WOW6432Node.
 	; Enable 64-bit registry view globally so NSIS registry commands (WriteRegStr,
@@ -197,6 +191,21 @@ Function .onInit
 		SetRegView 64
 	${EndIf}
 
+	; Windows 10 is the minimum supported OS. The runtime payload sets the
+	; floor: the bundled Python, Go and Rust runtimes require Windows 10, and
+	; Node 22 supports 8.1 only as experimental.
+	; Check this before the pending-reboot prompt so an unsupported system
+	; fails before any old version is removed. Keep the AtLeastWin8 feature
+	; gates below unchanged: they control optional components, not the floor.
+	${IfNot} ${AtLeastWin10}
+		MessageBox MB_ICONSTOP|MB_OK $(AtLeastWin10_MESSAGE)
+		Quit
+	${EndIf}
+
+	; Nothing to check for the C runtime: Windows 10 ships the UCRT in-box, and
+	; PIME ships no VC++ redistributable (the launcher and C++ DLLs are static
+	; and the Python embed carries its own vcruntime140.dll).
+
 	; Check if an earlier uninstallation or update scheduled locked files or directories
 	; to be deleted on reboot. If so, reinstalling before rebooting will cause Windows
 	; Session Manager to wipe the newly installed files on the next restart.
diff --git a/installer/locale/English.nsh b/installer/locale/English.nsh
index b92e47c5..4d9b9742 100644
--- a/installer/locale/English.nsh
+++ b/installer/locale/English.nsh
@@ -11,7 +11,7 @@
 !insertmacro LANG_STRING PRODUCT_PAGE "PIME project home page"
 !insertmacro LANG_STRING PRODUCT_PUBLISHER "PIME development team"
 
-!insertmacro LANG_STRING AtLeastWinVista_MESSAGE "Sorry，this program currently only supports Windows Vista or later"
+!insertmacro LANG_STRING AtLeastWin10_MESSAGE "Sorry，this program currently only supports Windows 10 or later"
 !insertmacro LANG_STRING REBOOT_QUESTION "The installation failed and could no be completed.$\r$\nA file may be in use, that prevents it from being deleted or overwritten.$\n$\nIt is recommended that you reboot the system and run the installer again.$\r$\nDo you want to reboot now? (Select $\"No$\" if you want to reboot at a later time)"
 !insertmacro LANG_STRING PENDING_REBOOT_QUESTION "A previous uninstallation or update of PIME requires a system restart to complete.$\r$\n$\r$\nIf you proceed without restarting, newly installed files may be deleted on the next reboot.$\r$\n$\r$\nDo you want to restart your computer now? (Select $\"No$\" to exit setup and restart later)"
 !insertmacro LANG_STRING INST_FAILED_MESSAGE "The installation failed and could no be completed.$\n$\rA file may be in use, that prevents it from being deleted or overwritten.$\n$\nIt is recommended that you reboot the system and run the installer again."
diff --git a/installer/locale/SimpChinese.nsh b/installer/locale/SimpChinese.nsh
index e971c9f3..eecd1a64 100644
--- a/installer/locale/SimpChinese.nsh
+++ b/installer/locale/SimpChinese.nsh
@@ -11,7 +11,7 @@
 !insertmacro LANG_STRING PRODUCT_PAGE "PIME 项目主页"
 !insertmacro LANG_STRING PRODUCT_PUBLISHER "PIME 开发团队"
 
-!insertmacro LANG_STRING AtLeastWinVista_MESSAGE "抱歉，本程序目前只能支持 Windows Vista 以上版本"
+!insertmacro LANG_STRING AtLeastWin10_MESSAGE "抱歉，本程序目前只能支持 Windows 10 以上版本"
 !insertmacro LANG_STRING REBOOT_QUESTION "安装发生错误，无法完成。$\r$\n有时是有文件正在使用中，暂时无法删除或覆写。$\n$\n建议重新开机后，再次执行安装程序。$\r$\n你要立即重新开机吗？ (若你想要在稍后才重新开机请选择「否」)"
 !insertmacro LANG_STRING PENDING_REBOOT_QUESTION "先前的 PIME 卸载或更新尚未完成，需要重新启动计算机。$\r$\n$\r$\n如果未重启就继续安装，新安装的文件可能会在下次开机时被系统删除。$\r$\n$\r$\n您要现在重新启动计算机吗？（选“否”将退出安装程序，以便稍后重启）"
 !insertmacro LANG_STRING INST_FAILED_MESSAGE "安装发生错误，无法完成。$\n$\n有时是有文件正在使用中，暂时无法删除或覆写。$\n$\n建议重新开机后，再次执行安装程序。"
diff --git a/installer/locale/TradChinese.nsh b/installer/locale/TradChinese.nsh
index a5827762..e37972e0 100644
--- a/installer/locale/TradChinese.nsh
+++ b/installer/locale/TradChinese.nsh
@@ -11,7 +11,7 @@
 !insertmacro LANG_STRING PRODUCT_PAGE "PIME 專案網頁"
 !insertmacro LANG_STRING PRODUCT_PUBLISHER "PIME 開發團隊"
 
-!insertmacro LANG_STRING AtLeastWinVista_MESSAGE "抱歉，本程式目前只能支援 Windows Vista 以上版本"
+!insertmacro LANG_STRING AtLeastWin10_MESSAGE "抱歉，本程式目前只能支援 Windows 10 以上版本"
 !insertmacro LANG_STRING REBOOT_QUESTION "安裝發生錯誤，無法完成。$\r$\n有時是有檔案正在使用中，暫時無法刪除或覆寫。$\n$\n建議重新開機後，再次執行安裝程式。$\r$\n你要立即重新開機嗎？ (若你想要在稍後才重新開機請選擇「否」)"
 !insertmacro LANG_STRING PENDING_REBOOT_QUESTION "先前的 PIME 解除安裝或更新尚未完成，需要重新啟動電腦。$\r$\n$\r$\n如果未重新開機便繼續安裝，新安裝的檔案可能會在下次開機時被系統刪除。$\r$\n$\r$\n您要現在重新啟動電腦嗎？（選「否」將結束安裝程式，以便稍後重新開機）"
 !insertmacro LANG_STRING INST_FAILED_MESSAGE "安裝發生錯誤，無法完成。$\n$\n有時是有檔案正在使用中，暫時無法刪除或覆寫。$\n$\n建議重新開機後，再次執行安裝程式。"