registryTweaks.ps1

# Miscellaneous registry modifications.
# Review before running.

# Privilege Escalation
if (!([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
    Start-Process PowerShell -Verb RunAs "-NoProfile -ExecutionPolicy Bypass -Command `"cd '$pwd'; & '$PSCommandPath';`"";
    exit;
}

# Sets clock to UTC, prevents time issues when dual booting Linux/OSX systems.
# Does not cause any regression when single booting.
Set-Itemproperty -path "HKLM:\SYSTEM\CurrentControlSet\Control\TimeZoneInformation" -Name "RealTimeIsUniversal" -Value 1

# Disable Fullscreen optimization in games, fixes fullscreen flickering with some display adapters.
# May improve gaming performance.
New-PSDrive HKU Registry HKEY_USERS
Set-Itemproperty -path "HKU:\*\System\GameConfigStore" -Name "GameDVR_FSEBehavior" -Value 2
Set-Itemproperty -path "HKU:\*\System\GameConfigStore" -Name "GameDVR_FSEBehaviorMode" -Value 2
Set-Itemproperty -path "HKU:\*\System\GameConfigStore" -Name "GameDVR_HonorUserFSEBehaviorMode" -Value 2
Remove-PSDrive -Name "HKU"

# Disable NetBIOS over TCP/IP service
# This legacy service (< Win2k) is vulnerable and shouldn't be used anymore.
# Do not remove if your computer belongs to your organization's network and you are not sure.
Set-Itemproperty -path "HKLM:\SYSTEM\CurrentControlSet\Services\NetBT" -Name "Start" -Value 4

# Disable Web Search on Windows 10 2004+
# https://winaero.com/disable-web-search-in-taskbar-in-windows-10-version-2004/
New-Item -Path "HKCU:\SOFTWARE\Policies\Microsoft\Windows\Explorer"
Set-Itemproperty -path "HKCU:\SOFTWARE\Policies\Microsoft\Windows\Explorer" -Name "DisableSearchBoxSuggestions" -Value 1

pause