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News : simple optimization with powershell 7 version.

Today, I tested this poweershell 7 version script:

# Check if script is running as Administrator
if (-not ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator")) {
    Write-Warning "Please run this script as Administrator."
    exit
}

Write-Host "Starting system optimization..." -ForegroundColor Cyan

# Set execution policy
try {
    Set-ExecutionPolicy RemoteSigned -Scope Process -Force
    Write-Host "Execution policy set to RemoteSigned." -ForegroundColor Green
} catch {}

# Clean temporary files
try {
    Remove-Item "$env:TEMP\*" -Recurse -Force -ErrorAction SilentlyContinue
    Remove-Item "C:\Windows\Temp\*" -Recurse -Force -ErrorAction SilentlyContinue
    Write-Host "Temporary files cleaned." -ForegroundColor Green
} catch {}

# Set High Performance power plan
try {
    powercfg -duplicatescheme SCHEME_MIN | Out-Null
    powercfg -setactive SCHEME_MIN
    Write-Host "High Performance power plan activated." -ForegroundColor Green
} catch {}

# Disable visual effects
try {
    Set-ItemProperty -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\VisualEffects" -Name "VisualFXSetting" -Value 2
    Write-Host "Visual effects disabled." -ForegroundColor Green
} catch {}

# Disable unnecessary services
$services = @(
    "DiagTrack", "WSearch", "Fax", "SysMain", "XblGameSave", "MapsBroker",
    "RetailDemo", "dmwappushservice", "RemoteRegistry", "WerSvc", "WMPNetworkSvc"
)
foreach ($svc in $services) {
    try {
        Stop-Service -Name $svc -Force -ErrorAction SilentlyContinue
        Set-Service -Name $svc -StartupType Disabled
        Write-Host "Service '$svc' disabled." -ForegroundColor Green
    } catch {
        Write-Warning "Could not disable service '$svc': $_"
    }
}

# Kill unwanted processes by name (PID cleanup)
$processesToKill = @("Cortana", "SkypeApp", "PeopleApp", "FeedbackHub", "SearchUI", "RuntimeBroker")
foreach ($proc in $processesToKill) {
    try {
        Get-Process -Name $proc -ErrorAction SilentlyContinue | Stop-Process -Force
        Write-Host "Process '$proc' terminated." -ForegroundColor Green
    } catch {
        Write-Warning "Could not terminate process '$proc': $_"
    }
}

# Optimize pagefile if RAM is 4GB or less
try {
    $ramGB = [math]::Round((Get-CimInstance -ClassName Win32_ComputerSystem).TotalPhysicalMemory / 1GB)
    if ($ramGB -le 4 -and (Get-Command wmic -ErrorAction SilentlyContinue)) {
        Start-Process powershell -ArgumentList "-Command `"wmic computersystem where name='%computername%' set AutomaticManagedPagefile=False; wmic pagefileset where name='C:\\pagefile.sys' set InitialSize=4096,MaximumSize=8192`"" -Verb RunAs
        Write-Host "Pagefile optimized for low RAM." -ForegroundColor Green
    }
} catch {}

# Configure DNS using netsh
try {
    $interfaces = Get-CimInstance -Namespace root/StandardCimv2 -ClassName MSFT_NetAdapter | Where-Object { $_.State -eq "Enabled" }
    foreach ($iface in $interfaces) {
        $name = $iface.Name
        Write-Host "Configuring DNS for interface '$name'..."
        Start-Process powershell.exe -ArgumentList "-Command `"netsh interface ip set dns name='$name' source=static addr=1.1.1.1`"" -Verb RunAs
        Start-Process powershell.exe -ArgumentList "-Command `"netsh interface ip add dns name='$name' addr=8.8.8.8 index=2`"" -Verb RunAs
        Write-Host "DNS configured for '$name'." -ForegroundColor Green
    }
} catch {
    Write-Warning "DNS configuration failed: $_"
}

# Legacy commands for PowerShell 5.1
$legacyCommands = @'
# Remove unwanted apps
$bloatware = @(
    "Microsoft.3DBuilder", "Microsoft.XboxApp", "Microsoft.ZuneMusic",
    "Microsoft.ZuneVideo", "Microsoft.BingWeather", "Microsoft.GetHelp",
    "Microsoft.Getstarted", "Microsoft.People", "Microsoft.SkypeApp",
    "Microsoft.WindowsFeedbackHub", "Microsoft.Cortana"
)
foreach ($app in $bloatware) {
    try {
        Get-AppxPackage -Name $app -AllUsers | Remove-AppxPackage -ErrorAction SilentlyContinue
        Write-Host "Removed app: $app"
    } catch {}
}

# Disable telemetry
try {
    Set-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows\DataCollection" -Name "AllowTelemetry" -Value 0 -Force
    Write-Host "Telemetry disabled."
} catch {}

# Enable SmartScreen
try {
    Set-MpPreference -EnableSmartScreen $true
    Write-Host "SmartScreen enabled."
} catch {}

# Enable firewall
try {
    Set-NetFirewallProfile -Profile Domain,Public,Private -Enabled True
    Write-Host "Firewall enabled."
} catch {}
'@

# Save and run legacy script in PowerShell 5.1
try {
    $tempScript = "$env:TEMP\legacy_opt.ps1"
    if (Test-Path $tempScript) { Remove-Item $tempScript -Force }
    Set-Content -Path $tempScript -Value $legacyCommands
    Start-Process powershell.exe -ArgumentList "-ExecutionPolicy Bypass -File `"$tempScript`"" -Verb RunAs
    Start-Sleep -Seconds 5
    Remove-Item $tempScript -Force -ErrorAction SilentlyContinue
    Write-Host "Legacy commands executed in PowerShell 5.1." -ForegroundColor Green
} catch {
    Write-Warning "Failed to execute legacy commands: $_"
}

# Final message
Write-Host "`nSystem optimization completed successfully. A restart is recommended." -ForegroundColor Cyan

This is the result:

.\optimization_001.ps1
Starting system optimization...
Execution policy set to RemoteSigned.
Temporary files cleaned.
High Performance power plan activated.
Visual effects disabled.
Service 'DiagTrack' disabled.
Service 'WSearch' disabled.
Service 'Fax' disabled.
Service 'SysMain' disabled.
Service 'XblGameSave' disabled.
Service 'MapsBroker' disabled.
Service 'RetailDemo' disabled.
Service 'dmwappushservice' disabled.
Service 'RemoteRegistry' disabled.
Service 'WerSvc' disabled.
Service 'WMPNetworkSvc' disabled.
Process 'Cortana' terminated.
Process 'SkypeApp' terminated.
Process 'PeopleApp' terminated.
Process 'FeedbackHub' terminated.
Process 'SearchUI' terminated.
Process 'RuntimeBroker' terminated.
Pagefile optimized for low RAM.
Legacy commands executed in PowerShell 5.1.

System optimization completed successfully. A restart is recommended.