#Requires -RunAsAdministrator

# ── Power plan: High Performance ────────────────────────────────────────────
powercfg /setactive 8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c

# ── Hibernate: off (saves ~RAM-size on disk) ─────────────────────────────────
powercfg /hibernate off

# ── System Restore: off (saves disk and shadow-copy overhead) ────────────────
Disable-ComputerRestore -Drive "C:\" -ErrorAction SilentlyContinue
vssadmin delete shadows /for=C: /all /quiet 2>$null

# ── Visual effects: best performance ─────────────────────────────────────────
$ve = "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\VisualEffects"
New-Item -Path $ve -Force -ErrorAction SilentlyContinue | Out-Null
Set-ItemProperty -Path $ve -Name VisualFXSetting -Value 2 -Type DWord

$desktop = "HKCU:\Control Panel\Desktop"
Set-ItemProperty -Path $desktop -Name DragFullWindows -Value "0"
Set-ItemProperty -Path $desktop -Name MenuShowDelay   -Value "0"

$adv = "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced"
Set-ItemProperty -Path $adv -Name TaskbarAnimations -Value 0 -Type DWord
Set-ItemProperty -Path $adv -Name DisallowShaking   -Value 1 -Type DWord

# ── Page file: fixed size to avoid resize churn ──────────────────────────────
$cs = Get-WmiObject Win32_ComputerSystem -EnableAllPrivileges
$cs.AutomaticManagedPagefile = $false
$cs.Put() | Out-Null

$pf = Get-WmiObject -Query "Select * From Win32_PageFileSetting Where Name='C:\\pagefile.sys'"
if ($pf) {
    $pf.InitialSize = 2048
    $pf.MaximumSize = 4096
    $pf.Put() | Out-Null
}

# ── NTFS: skip Last Access Time updates ──────────────────────────────────────
fsutil behavior set disablelastaccess 1 | Out-Null

# ── Processor scheduling: favor background services (better for VM workloads) ─
Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Control\PriorityControl" `
    -Name Win32PrioritySeparation -Value 24 -Type DWord