用了一段时间变卡了？找到元凶

# PowerShell - 系统变慢诊断脚本
Write-Host "=== 电脑变慢诊断 ===" -ForegroundColor Cyan

# 1. 检查 CPU 使用率最高的进程
Write-Host "\n📊 CPU 占用 Top 5:" -ForegroundColor Yellow
Get-Process | Sort-Object CPU -Descending | Select-Object -First 5 Name, CPU, WorkingSet64 | Format-Table

# 2. 检查内存使用
Write-Host "💾 内存使用:" -ForegroundColor Yellow
$os = Get-CimInstance Win32_OperatingSystem
$usedMem = [math]::Round(($os.TotalVisibleMemorySize - $os.FreePhysicalMemory) / 1MB, 1)
$totalMem = [math]::Round($os.TotalVisibleMemorySize / 1MB, 1)
Write-Host "  已用: $usedMem GB / 总计: $totalMem GB"

# 3. 检查磁盘使用率
Write-Host "\n💿 磁盘空间:" -ForegroundColor Yellow
Get-WmiObject Win32_LogicalDisk | Where-Object {$_.DriveType -eq 3} | ForEach-Object {
  $free = [math]::Round($_.FreeSpace/1GB, 1)
  $total = [math]::Round($_.Size/1GB, 1)
  Write-Host "  $($_.DeviceID) 剩余 $free GB / 总计 $total GB"
}

# 4. 检查启动项数量
Write-Host "\n🚀 启动项数量:" -ForegroundColor Yellow
$startups = Get-CimInstance Win32_StartupCommand
Write-Host "  共 $($startups.Count) 个启动项"

# 5. 检查系统运行时间
Write-Host "\n⏱ 上次重启:" -ForegroundColor Yellow
$boot = (Get-CimInstance Win32_OperatingSystem).LastBootUpTime
Write-Host "  $boot (建议每周重启一次)"

Write-Host "\n✅ 诊断完成！" -ForegroundColor Green