# Disable unnecessary services
$services = @(
    "wsearch",  # Windows Search
    "SysMain",  # Superfetch
    "wuauserv"  # Windows Update
)

foreach ($service in $services) {
    Set-Service -Name $service -StartupType Disabled
    Stop-Service -Name $service -Force
}

# Set performance options to 'Adjust for best performance'
$regPath = "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\VisualEffects"
$regValue = "VisualFXSetting"

if (Test-Path $regPath) {
    Set-ItemProperty -Path $regPath -Name $regValue -Value 2
} else {
    New-Item -Path $regPath -Force
    New-ItemProperty -Path $regPath -Name $regValue -Value 2 -Force
}

# Adjust virtual memory (custom size)
$minPageFile = 2048
$maxPageFile = 4096
$computer = Get-WmiObject Win32_ComputerSystem -EnableAllPrivileges
$computer.AutomaticManagedPagefile = $false
$computer.Put()

$pageFile = Get-WmiObject Win32_PageFileSetting
if ($pageFile) {
    $pageFile.InitialSize = $minPageFile
    $pageFile.MaximumSize = $maxPageFile
    $pageFile.Put()
} else {
    ([WmiClass]"\\.\root\cimv2:Win32_PageFileSetting").Create("C:\pagefile.sys", $minPageFile, $maxPageFile)
}

# Disable startup programs
$startupPrograms = @(
    "Sidebar",
    "AdobeARM",
    "QuickTime Task"
)

foreach ($program in $startupPrograms) {
    $task = Get-ScheduledTask | Where-Object {$_.TaskName -like "*$program*"}
    if ($task) {
        Disable-ScheduledTask -TaskName $task.TaskName
    }
}

# Disk cleanup
Start-Process cleanmgr -ArgumentList "/sagerun:1" -NoNewWindow -Wait

# Defragment the hard drive
defrag C: -f

# Set power plan to high performance
powercfg -setactive SCHEME_MIN

# Optimize network settings (disable QoS Packet Scheduler)
$networkAdapters = Get-WmiObject Win32_NetworkAdapterConfiguration | Where-Object {$_.IPEnabled -eq $true}
foreach ($adapter in $networkAdapters) {
    $adapter.SettingID
    Set-WmiInstance -Path Win32_NetworkAdapterSetting.SettingID=$adapter.SettingID -Arguments @{QoSPacketSchedulerEnabled=$false}
}

# Disable visual effects (already done through registry, but ensuring it's enforced)
$visualEffects = @(
    "MinAnimate",
    "FontSmoothing"
)

foreach ($effect in $visualEffects) {
    Set-ItemProperty -Path "HKCU:\Control Panel\Desktop" -Name $effect -Value 0
}

# Restart to apply changes
Write-Output "Optimizations applied. It's recommended to restart the server to apply all changes."