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#########################################################################################################
#Read all about the tweaks here on Melodys page: https://sites.google.com/view/melodystweaks/basictweaks#
#########################################################################################################
# in 2.0 you can actually overwrite current values! Amazing i know..smh :D
function Set-RegistryValue {
    param (
        [string]$path,
        [string]$name,
        $value,
        [string]$type = "DWord",
        [switch]$Force
    )
    # Check if the key exists and create it if it doesn't
    $key = Get-Item -Path $path -ErrorAction SilentlyContinue
    if ($null -eq $key) {
        try {
            New-Item -Path $path -Force | Out-Null
            $key = Get-Item -Path $path
            Write-Host "Creating key at $path." -ForegroundColor Green
        }
        catch {
            Write-Warning "Failed to create key $key. $_"
        }
    }
    else {
        Write-Host "Key at $path already exists."
    }
    # Set the value, overwriting if it exists when -Force is specified
    try {
        if ($Force -or ($key.GetValue($name, "NotExist") -eq "NotExist")) {
            Set-ItemProperty -Path $path -Name $name -Value $value -Type $type -Force | Out-Null
            Write-Host "Setting $type value $name to $value." -ForegroundColor Green
        }
        else {
            Write-Host "$type value $name with existing value already exists. Use -Force to overwrite." -ForegroundColor Yellow
        }
    }
    catch {
        Write-Warning "Failed to set value $name at $path. $_"
    }
}
# Registry settings
$registryValues = @{
    "HKLM:\SOFTWARE\Policies\Microsoft\FVE"                                                                 = @{
        "DisableExternalDMAUnderLock" = @{ Value = 0; Type = "DWord" }
    }
    "HKLM:\SOFTWARE\Policies\Microsoft\Windows\DeviceGuard"                                                 = @{
        "EnableVirtualizationBasedSecurity" = @{ Value = 0; Type = "DWord" }
        "HVCIMATRequired"                   = @{ Value = 0; Type = "DWord" }
    }
    "HKLM:\SYSTEM\CurrentControlSet\Control\Session Manager\kernel"                                         = @{
        "DisableExceptionChainValidation" = @{ Value = 1; Type = "DWord" }
        "KernelSEHOPEnabled"              = @{ Value = 0; Type = "DWord" }
    }
    "HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\csrss.exe\PerfOptions" = @{
        "CpuPriorityClass" = @{ Value = 4; Type = "DWord" }
        "IoPriority"       = @{ Value = 3; Type = "DWord" }
    }
    "HKLM:\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management"                              = @{
        "FeatureSettings"             = @{ Value = 1; Type = "DWord" }
        "FeatureSettingsOverride"     = @{ Value = 3; Type = "DWord" }
        "FeatureSettingsOverrideMask" = @{ Value = 3; Type = "DWord" }
        "EnableCfg"                   = @{ Value = 0; Type = "DWord" }
        "DisablePagingExecutive"      = @{ Value = 1; Type = "DWord" }
        "LargeSystemCache"            = @{ Value = 1; Type = "DWord" }
    }
    "HKLM:\SYSTEM\CurrentControlSet\Control\Session Manager"                                                = @{
        "ProtectionMode" = @{ Value = 0; Type = "DWord" }
    }
    "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Reliability"                                           = @{
        "TimeStampInterval" = @{ Value = 1; Type = "DWord" }
    }
    "HKLM:\SYSTEM\CurrentControlSet\Control\GraphicsDrivers"                                                = @{
        "DpiMapIommuContiguous" = @{ Value = 1; Type = "DWord" }
    }
    #####################################################################
    #NVIDIA VALUES - CHANGE TO AMD VALUES DOWN BELOW YOU HAVE A AMD CARD#
    #####################################################################
    "HKLM:\SYSTEM\CurrentControlSet\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0000"              = @{
        "PreferSystemMemoryContiguous"       = @{ Value = 1; Type = "DWord" }
        "D3PCLatency"                        = @{ Value = 1; Type = "DWord" }
        "F1TransitionLatency"                = @{ Value = 1; Type = "DWord" }
        "LOWLATENCY"                         = @{ Value = 1; Type = "DWord" }
        "Node3DLowLatency"                   = @{ Value = 1; Type = "DWord" }
        "PciLatencyTimerControl"             = @{ Value = 32; Type = "DWord" }
        "RMDeepL1EntryLatencyUsec"           = @{ Value = 1; Type = "DWord" }
        "RmGspcMaxFtuS"                      = @{ Value = 1; Type = "DWord" }
        "RmGspcMinFtuS"                      = @{ Value = 1; Type = "DWord" }
        "RmGspcPerioduS"                     = @{ Value = 1; Type = "DWord" }
        "RMLpwrEiIdleThresholdUs"            = @{ Value = 1; Type = "DWord" }
        "RMLpwrGrIdleThresholdUs"            = @{ Value = 1; Type = "DWord" }
        "RMLpwrGrRgIdleThresholdUs"          = @{ Value = 1; Type = "DWord" }
        "RMLpwrMsIdleThresholdUs"            = @{ Value = 1; Type = "DWord" }
        "VRDirectFlipDPCDelayUs"             = @{ Value = 1; Type = "DWord" }
        "VRDirectFlipTimingMarginUs"         = @{ Value = 1; Type = "DWord" }
        "VRDirectJITFlipMsHybridFlipDelayUs" = @{ Value = 1; Type = "DWord" }
        "vrrCursorMarginUs"                  = @{ Value = 1; Type = "DWord" }
        "vrrDeflickerMarginUs"               = @{ Value = 1; Type = "DWord" }
        "vrrDeflickerMaxUs"                  = @{ Value = 1; Type = "DWord" }
        #"LTRSnoopL0Latency"                  = @{ Value = 1; Type = "DWord" }
        #"LTRNoSnoopL1Latency"                = @{ Value = 1; Type = "DWord" }
        #"LTRMaxNoSnoopLatency"               = @{ Value = 1; Type = "DWord" }
        #"KMD_RpmComputeLatency"              = @{ Value = 1; Type = "DWord" }
        #"DalUrgentLatencyNs"                 = @{ Value = 1; Type = "DWord" }
        #"memClockSwitchLatency"              = @{ Value = 1; Type = "DWord" }
        #"PP_RTPMComputeF1Latency"            = @{ Value = 1; Type = "DWord" }
        #"PP_DGBMMMaxTransitionLatencyUvd"    = @{ Value = 1; Type = "DWord" }
        #"PP_DGBPMMaxTransitionLatencyGfx"    = @{ Value = 1; Type = "DWord" }
        #"DalNBLatencyForUnderFlow"           = @{ Value = 1; Type = "DWord" }
        #"DalDramClockChangeLatencyNs"        = @{ Value = 1; Type = "DWord" } #(WARNING: This dword caused massive screen flickering for some people, use it at your own risk. If you're already using it and you have problems, simply delete the dword and reboot the system)
        #"BGM_LTRSnoopL1Latency"              = @{ Value = 1; Type = "DWord" }
        #"BGM_LTRSnoopL0Latency"              = @{ Value = 1; Type = "DWord" }
        #"BGM_LTRNoSnoopL1Latency"            = @{ Value = 1; Type = "DWord" }
        #"BGM_LTRNoSnoopL0Latency"            = @{ Value = 1; Type = "DWord" }
        #"BGM_LTRMaxSnoopLatencyValue"        = @{ Value = 1; Type = "DWord" }
        #"BGM_LTRMaxNoSnoopLatencyValue"      = @{ Value = 1; Type = "DWord" }
    }
    "HKLM:\SOFTWARE\Policies\Microsoft\Windows\DataCollection"                                              = @{
        "AllowTelemetry" = @{ Value = 0; Type = "DWord" }
    }
    "HKLM:\SOFTWARE\Policies\Microsoft\Windows\AppCompat"                                                   = @{
        "AITEnable" = @{ Value = 0; Type = "DWord" }
    }
    "HKLM:\SOFTWARE\Policies\Microsoft\Windows\Windows Error Reporting"                                     = @{
        "Disabled" = @{ Value = 1; Type = "DWord" }
    }
    "HKLM:\SOFTWARE\Policies\Microsoft\Windows\QoS"                                                         = @{
        "Tcp Autotuning Level"             = @{ Value = "Experimental"; Type = "String" }
        "Application DSCP Marking Request" = @{ Value = "Allowed"; Type = "String" }
    }
    "HKLM:\SYSTEM\CurrentControlSet\Services\mouclass\Parameters"                                           = @{
        "MouseDataQueueSize" = @{ Value = 16; Type = "DWord" }
    }
    "HKLM:\SYSTEM\CurrentControlSet\Services\kbdclass\Parameters"                                           = @{
        "KeyboardDataQueueSize" = @{ Value = 16; Type = "DWord" }
    }
    "HKLM:\SYSTEM\CurrentControlSet\Control\Power"                                                          = @{
        "ExitLatency"                  = @{ Value = 1; Type = "DWord" }
        "ExitLatencyCheckEnabled"      = @{ Value = 1; Type = "DWord" }
        "Latency"                      = @{ Value = 1; Type = "DWord" }
        "LatencyToleranceDefault"      = @{ Value = 1; Type = "DWord" }
        "LatencyToleranceFSVP"         = @{ Value = 1; Type = "DWord" }
        "LatencyTolerancePerfOverride" = @{ Value = 1; Type = "DWord" }
        "LatencyToleranceScreenOffIR"  = @{ Value = 1; Type = "DWord" }
        "LatencyToleranceVSyncEnabled" = @{ Value = 1; Type = "DWord" }
        "RtlCapabilityCheckLatency"    = @{ Value = 1; Type = "DWord" }
    }
    "HKLM:\SYSTEM\CurrentControlSet\Control\GraphicsDrivers\Power"                                          = @{
        "DefaultD3TransitionLatencyActivelyUsed"           = @{ Value = 1; Type = "DWord" }
        "DefaultD3TransitionLatencyIdleLongTime"           = @{ Value = 1; Type = "DWord" }
        "DefaultD3TransitionLatencyIdleMonitorOff"         = @{ Value = 1; Type = "DWord" }
        "DefaultD3TransitionLatencyIdleNoContext"          = @{ Value = 1; Type = "DWord" }
        "DefaultD3TransitionLatencyIdleShortTime"          = @{ Value = 1; Type = "DWord" }
        "DefaultD3TransitionLatencyIdleVeryLongTime"       = @{ Value = 1; Type = "DWord" }
        "DefaultLatencyToleranceIdle0"                     = @{ Value = 1; Type = "DWord" }
        "DefaultLatencyToleranceIdle0MonitorOff"           = @{ Value = 1; Type = "DWord" }
        "DefaultLatencyToleranceIdle1"                     = @{ Value = 1; Type = "DWord" }
        "DefaultLatencyToleranceIdle1MonitorOff"           = @{ Value = 1; Type = "DWord" }
        "DefaultLatencyToleranceMemory"                    = @{ Value = 1; Type = "DWord" }
        "DefaultLatencyToleranceNoContext"                 = @{ Value = 1; Type = "DWord" }
        "DefaultLatencyToleranceNoContextMonitorOff"       = @{ Value = 1; Type = "DWord" }
        "DefaultLatencyToleranceOther"                     = @{ Value = 1; Type = "DWord" }
        "DefaultLatencyToleranceTimerPeriod"               = @{ Value = 1; Type = "DWord" }
        "DefaultMemoryRefreshLatencyToleranceActivelyUsed" = @{ Value = 1; Type = "DWord" }
        "DefaultMemoryRefreshLatencyToleranceMonitorOff"   = @{ Value = 1; Type = "DWord" }
        "DefaultMemoryRefreshLatencyToleranceNoContext"    = @{ Value = 1; Type = "DWord" }
        "Latency"                                          = @{ Value = 1; Type = "DWord" }
        "MaxIAverageGraphicsLatencyInOneBucket"            = @{ Value = 1; Type = "DWord" }
        "MiracastPerfTrackGraphicsLatency"                 = @{ Value = 1; Type = "DWord" }
        "MonitorLatencyTolerance"                          = @{ Value = 1; Type = "DWord" }
        "MonitorRefreshLatencyTolerance"                   = @{ Value = 1; Type = "DWord" }
        "TransitionLatency"                                = @{ Value = 1; Type = "DWord" }
    }
    "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System"                                       = @{
        "VerboseStatus" = @{ Value = 1; Type = "DWord" }
    }
}
# Apply registry settings
foreach ($path in $registryValues.Keys) {
    foreach ($name in $registryValues[$path].Keys) {
        $value = $registryValues[$path][$name].Value
        $type = $registryValues[$path][$name].Type
        Set-RegistryValue -path $path -name $name -value $value -type $type -Force #Added -Force to overwrite current values.
    }
}
# BCDEdit commands
bcdedit /set linearaddress57 OptOut
bcdedit /set increaseuserva 268435328
bcdedit /set firstmegabytepolicy UseAll
bcdedit /set avoidlowmemory 0x8000000
bcdedit /set nolowmem Yes
bcdedit /set allowedinmemorysettings 0x0
bcdedit /set isolatedcontext No
bcdedit /set vsmlaunchtype Off
bcdedit /set vm No
bcdedit /set x2apicpolicy Enable
bcdedit /set configaccesspolicy Default
bcdedit /set MSI Default
bcdedit /set usephysicaldestination No
bcdedit /set usefirmwarepcisettings No
bcdedit /deletevalue useplatformclock
bcdedit /deletevalue disabledynamictick
bcdedit /set useplatformtick Yes
bcdedit /set tscsyncpolicy Enhanced
bcdedit /set disableelamdrivers Yes

# Netsh commands
netsh int tcp set global autotuning=experimental
netsh int tcp set supp internet congestionprovider=newreno
netsh int udp set global uro=enabled
netsh int teredo set state natawareclient
netsh int 6to4 set state state=enabled
netsh advfirewall set allprofiles state on
netsh winsock set autotuning on

# PowerShell commands
Disable-MMAgent -MemoryCompression -ErrorAction SilentlyContinue
Get-NetAdapter -IncludeHidden | Set-NetIPInterface -WeakHostSend Enabled -WeakHostReceive Enabled -ErrorAction SilentlyContinue
ForEach ($v in (Get-Command -Name "Set-ProcessMitigation").Parameters["Disable"].Attributes.ValidValues) {
    if ($v.ToString()) {
        try {
            Set-ProcessMitigation -System -Disable $v.ToString() -ErrorAction Stop
            Write-Host "Setting process mitigation on: $($v.toString())" -ForegroundColor Green
        }
        catch {
            Write-Warning "Could not set process mitigation on: $($v.toString())"
        }
    }
}
Remove-Item -Path "HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\*" -Recurse -ErrorAction SilentlyContinue

# WMIC commands
$computerSystem = Get-CimInstance -ClassName Win32_ComputerSystem -ErrorAction SilentlyContinue
$computerSystem.AutomaticManagedPagefile = $false
Set-CimInstance -InputObject $computerSystem -ErrorAction SilentlyContinue

$pageFile = Get-CimInstance -ClassName Win32_PageFileSetting -Filter "Name='C:\\pagefile.sys'" -ErrorAction SilentlyContinue
$pageFile.InitialSize = 32768
$pageFile.MaximumSize = 32768
Set-CimInstance -InputObject $pageFile -ErrorAction SilentlyContinue

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