diff --git a/A2A_node/scripts/a2a.py b/A2A_node/scripts/a2a.py
index f3c56b9..047a7b5 100644
--- a/A2A_node/scripts/a2a.py
+++ b/A2A_node/scripts/a2a.py
@@ -855,7 +855,8 @@ def cmd_bmem(a):
     line = "A2A-NODE %s %s" % (cfg["node_id"], " ".join(urls))
     print("bmem add --global", line)
     if not a.dry_run:
-        subprocess.run(["bmem", "add", "--global", line])
+        # which() honours PATHEXT, so a bmem.cmd shim is found too (CreateProcess alone is not)
+        subprocess.run([shutil.which("bmem") or "bmem", "add", "--global", line], check=True)
 
 
 def main():
diff --git a/A2A_node/scripts/manage.ps1 b/A2A_node/scripts/manage.ps1
index f02364a..47c108d 100644
--- a/A2A_node/scripts/manage.ps1
+++ b/A2A_node/scripts/manage.ps1
@@ -54,13 +54,20 @@ switch ($Action) {
     Copy-Item (Join-Path $PSScriptRoot 'claude-a2a.cmd') $dst -Force
     $mcp = (Get-Content (Join-Path $ch 'mcp.json') -Raw) -replace 'C:/Users/bowei', $env:USERPROFILE.Replace('\', '/')
     Set-Content (Join-Path $ch 'mcp.json') $mcp -Encoding ascii
-    Push-Location $ch; npm install --no-audit --no-fund 2>&1 | Out-Null; Pop-Location
+    # via cmd: under PS 5.1 + ErrorActionPreference=Stop, npm.ps1's stderr "npm notice" lines abort the install
+    Push-Location $ch; cmd /c "npm install --no-audit --no-fund >nul 2>&1"; $npmRc = $LASTEXITCODE; Pop-Location
+    if ($npmRc -ne 0) { throw "npm install failed in $ch (exit $npmRc)" }
     # cmd shim so sessions can just call `a2a`
     "@python `"$script`" %*" | Set-Content (Join-Path $dst 'a2a.cmd') -Encoding ascii
     $act = New-ScheduledTaskAction -Execute $py -Argument "`"$script`" serve"
     $trg = New-ScheduledTaskTrigger -AtLogOn -User $env:USERNAME
     $set = New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -DontStopIfGoingOnBatteries -RestartCount 3 -RestartInterval (New-TimeSpan -Minutes 1) -ExecutionTimeLimit ([TimeSpan]::Zero)
-    Register-ScheduledTask -TaskName $task -Action $act -Trigger $trg -Settings $set -Force | Out-Null
+    # AtLogOn tasks need admin on some machines; fall back to the per-user Run key (no admin, no auto-restart)
+    try { Register-ScheduledTask -TaskName $task -Action $act -Trigger $trg -Settings $set -Force -ErrorAction Stop | Out-Null; "autostart: scheduled task '$task'" }
+    catch {
+      Set-ItemProperty 'HKCU:\Software\Microsoft\Windows\CurrentVersion\Run' -Name $task -Value "`"$py`" `"$script`" serve"
+      "autostart: scheduled task denied ($($_.Exception.Message.Trim())); registered HKCU Run '$task' instead"
+    }
     Ensure-Firewall
     Start-Node
     Start-Sleep 2
@@ -69,5 +76,6 @@ switch ($Action) {
   'start'     { Start-Node; Start-Sleep 2; & python.exe $script status }
   'stop'      { Stop-Node; 'stopped' }
   'status'    { & python.exe $script status; & python.exe $script ls; & python.exe $script peers }
-  'uninstall' { Stop-Node; Unregister-ScheduledTask -TaskName $task -Confirm:$false -ErrorAction SilentlyContinue; 'removed (config kept in ~/.a2a)' }
+  'uninstall' { Stop-Node; Unregister-ScheduledTask -TaskName $task -Confirm:$false -ErrorAction SilentlyContinue
+                Remove-ItemProperty 'HKCU:\Software\Microsoft\Windows\CurrentVersion\Run' -Name $task -ErrorAction SilentlyContinue; 'removed (config kept in ~/.a2a)' }
 }