diff --git a/scripts/windows/Run-PayrollHost.ps1 b/scripts/windows/Run-PayrollHost.ps1
index c149044..8bfcdf1 100644
--- a/scripts/windows/Run-PayrollHost.ps1
+++ b/scripts/windows/Run-PayrollHost.ps1
@@ -16,15 +16,29 @@ $env:T_PLUS_ENABLED = 'true'
 $env:T_PLUS_CONNECTION_FILE = $plan.ConnectionFile
 $logs = Join-Path $plan.RuntimeDirectory 'logs'
 New-Item -ItemType Directory -Path $logs -Force | Out-Null
-$stamp = (Get-Date -Format 'yyyyMMdd-HHmmss') + '-' + [guid]::NewGuid().ToString('N').Substring(0,8)
+
+function Limit-PayrollLog([string]$Path) {
+    # current 供本次运行写入，previous 保留上一次；每分钟任务不再生成无限文件。
+    $previous = [IO.Path]::ChangeExtension($Path, '.prev.log')
+    if (Test-Path -LiteralPath $Path) {
+        # .NET Framework 的 File.Replace 不接受 PowerShell 5 转换出的空备份路径。
+        Move-Item -LiteralPath $Path -Destination $previous -Force
+    }
+}
+
+$stdoutLog = Join-Path $logs "$Role.out.log"
+$stderrLog = Join-Path $logs "$Role.err.log"
+Limit-PayrollLog $stdoutLog
+Limit-PayrollLog $stderrLog
+
 $arguments = switch ($Role) {
     'backend' { '-m uvicorn app.main:app --host 127.0.0.1 --port ' + $ApiPort }
     'worker' { '-m app.cli tplus-worker --watch --connection-file ' + (Quote-TaskArgument $plan.ConnectionFile) + ' --stop-file ' + (Quote-TaskArgument $plan.StopFile) }
     'maintenance' { '-m app.cli tplus-maintain --once --connection-file ' + (Quote-TaskArgument $plan.ConnectionFile) + ' --stop-file ' + (Quote-TaskArgument $plan.StopFile) }
 }
 $process = Start-Process -FilePath $plan.PythonPath -ArgumentList $arguments -WorkingDirectory (Join-Path $plan.ProjectRoot 'backend') `
-    -WindowStyle Hidden -PassThru -RedirectStandardOutput (Join-Path $logs "$Role-$stamp.out.log") `
-    -RedirectStandardError (Join-Path $logs "$Role-$stamp.err.log")
+    -WindowStyle Hidden -PassThru -RedirectStandardOutput $stdoutLog `
+    -RedirectStandardError $stderrLog
 $processHandle = $process.Handle
 while (-not $process.HasExited) {
     if ($Role -eq 'backend' -and (Test-Path -LiteralPath $plan.StopFile)) { Stop-Process -Id $process.Id -ErrorAction Stop }
diff --git a/scripts/windows/Test-PayrollHostRuntime.ps1 b/scripts/windows/Test-PayrollHostRuntime.ps1
index fab499e..6effdc6 100644
--- a/scripts/windows/Test-PayrollHostRuntime.ps1
+++ b/scripts/windows/Test-PayrollHostRuntime.ps1
@@ -10,6 +10,8 @@ New-Item -ItemType Directory -Path $app -Force | Out-Null
 import os,sys,time
 from pathlib import Path
 if 'tplus-maintain' in sys.argv:
+    print('maintenance result')
+    print('maintenance error', file=sys.stderr)
     raise SystemExit(7)
 stop=Path(os.environ['T_PLUS_STOP_FILE'])
 stop.parent.mkdir(parents=True,exist_ok=True)
@@ -48,4 +50,15 @@ Remove-Item -LiteralPath (Join-Path $runtime 'stop.requested')
 $failureProcess = Start-TestHost 'maintenance'
 if (-not $failureProcess.WaitForExit(15000)) { throw '隔离失败进程未退出。' }
 if ($failureProcess.ExitCode -ne 7) { throw '启动器没有保留子进程失败退出码。' }
-Write-Output 'Windows PowerShell5 隔离托管验证通过：路径含空格、隐藏子进程启动、停止标记退出、失败退出码传递；未注册计划任务或连接业务数据库。'
+for ($attempt = 0; $attempt -lt 2; $attempt++) {
+    $failureProcess = Start-TestHost 'maintenance'
+    if (-not $failureProcess.WaitForExit(15000) -or $failureProcess.ExitCode -ne 7) {
+        throw '日志轮转后启动器没有保留子进程失败退出码。'
+    }
+}
+$maintenanceLogs = @(Get-ChildItem -LiteralPath (Join-Path $runtime 'logs') -Filter 'maintenance*.log')
+if ($maintenanceLogs.Count -ne 4) { throw '维护任务日志没有限定为当前和上一次的四个文件。' }
+foreach ($file in $maintenanceLogs) {
+    if ($file.Length -eq 0) { throw '轮转后日志内容丢失。' }
+}
+Write-Output 'Windows PowerShell5 隔离托管验证通过：含空格路径、隐藏子进程、停止标记、失败退出码及日志轮转；未注册计划任务或连接业务数据库。'