diff --git a/src/main/capabilities/desktop-uia.ts b/src/main/capabilities/desktop-uia.ts
index 8e9a154..6243560 100644
--- a/src/main/capabilities/desktop-uia.ts
+++ b/src/main/capabilities/desktop-uia.ts
@@ -136,8 +136,11 @@ function clickScript(t: UiaTarget): string {
   const doubleClick = clickway === "1" || /double/i.test(clickway);
   return `${UIA_USING}
 ${FIND_HELPER}
-$parent = Find-RpaWindow ${psString(s.window ?? "")}
-$el = Find-RpaElement $parent ${psString(s.name ?? "")} ${psString(s.id ?? "")} ${psString(s.type ?? "")} ${psString(s.className ?? "")} ${s.index}
+$el = $null
+try {
+  $parent = Find-RpaWindow ${psString(s.window ?? "")}
+  $el = Find-RpaElement $parent ${psString(s.name ?? "")} ${psString(s.id ?? "")} ${psString(s.type ?? "")} ${psString(s.className ?? "")} ${s.index}
+} catch { $el = $null }
 if ($null -eq $el) { Write-Output "JSON_NOT_FOUND"; exit 0 }
 $rect = $el.Current.BoundingRectangle
 $offscreen = $el.Current.IsOffscreen -or $rect.Width -le 0 -or $rect.Height -le 0
@@ -190,8 +193,9 @@ function setValueScript(t: UiaTarget, value: string): string {
   const s = t.selector;
   return `${UIA_USING}
 ${FIND_HELPER}
-$parent = Find-RpaWindow ${psString(s.window ?? "")}
-$el = Find-RpaElement $parent ${psString(s.name ?? "")} ${psString(s.id ?? "")} ${psString(s.type ?? "")} ${psString(s.className ?? "")} ${s.index}
+try {
+  $parent = Find-RpaWindow ${psString(s.window ?? "")}
+  $el = Find-RpaElement $parent ${psString(s.name ?? "")} ${psString(s.id ?? "")} ${psString(s.type ?? "")} ${psString(s.className ?? "")} ${s.index}
 if ($null -eq $el) { Write-Output "JSON_NOT_FOUND"; exit 0 }
 $value = ${psString(value)}
 $method = "value_pattern"
@@ -225,8 +229,9 @@ function getValueScript(t: UiaTarget): string {
   const s = t.selector;
   return `${UIA_USING}
 ${FIND_HELPER}
-$parent = Find-RpaWindow ${psString(s.window ?? "")}
-$el = Find-RpaElement $parent ${psString(s.name ?? "")} ${psString(s.id ?? "")} ${psString(s.type ?? "")} ${psString(s.className ?? "")} ${s.index}
+try {
+  $parent = Find-RpaWindow ${psString(s.window ?? "")}
+  $el = Find-RpaElement $parent ${psString(s.name ?? "")} ${psString(s.id ?? "")} ${psString(s.type ?? "")} ${psString(s.className ?? "")} ${s.index}
 if ($null -eq $el) { Write-Output "JSON_NOT_FOUND"; exit 0 }
 $value = $el.Current.Name
 try { $vp = $el.GetCurrentPattern([System.Windows.Automation.ValuePattern]::Pattern); $value = $vp.Value } catch {}
@@ -247,7 +252,7 @@ async function runScript(script: string, t: UiaTarget, timeoutMs = 60000): Promi
 function requireFound(result: Record<string, unknown> | null, t: UiaTarget, action: string): Record<string, unknown> {
   if (!result) {
     const s = t.selector;
-    throw new RuntimeError("desktop_element_not_found", `桌面元素未找到（${action}）：${JSON.stringify({ window: s.window, name: s.name, id: s.id, type: s.type, className: s.className, index: s.index })}`, { nodeId: t.node.id, componentId: t.node.componentId });
+    throw new RuntimeError("desktop_element_not_found", `桌面元素未找到（${action}）：${JSON.stringify({ window: s.window, name: s.name, id: s.id, type: s.type, className: s.className, index: s.index })}。若指定了窗口，请确认应用已启动且主窗口未最小化到托盘`, { nodeId: t.node.id, componentId: t.node.componentId });
   }
   return result;
 }
@@ -291,3 +296,5 @@ register("Element_ExistsGround", existsGround);
 register("Element_GetValueGround", getValueGround);
 register("Element_WaitElementGround", waitElementGround);
 
+
+