Debloating & Privacy
Pro Tip: Make a Restore Point when modifying your Windows install!AtlasOS - A lightweight modification of Windows designed to maximize your system's performance, privacy and optimize latency, Highly recommended.
Full Windows Re-install required.
TronScript - The most efficient and automated way to clean, De-bloat, optimize and disinfect your old Windows install, recommended.
BE SURE TO READ THE INSTRUCTIONS!
Sophia-Script - The largest PowerShell module for Windows 10 & 11 tuning.
OptimizerNXT - A powerful, YAML-driven CLI tool for automating Windows tweaks.
AME Wizard | MSMG Toolkit | NTLite - Tools to customize your Windows ISO.
Honorable Mentions
AutoRuns - See what programs are configured to startup automatically when your system boots.
BCUninstaller - A better Uninstaller than Windows's default one, really good for Bulk Uninstalling multiple apps at once.
BleachBit - A FOSS replacement for CCleaner which helps to effectively clean and uninstall apps.
Ventoy | Rufus - A tool to create bootable USB drives.
InstallWindowsWithoutUSB - A batch script to install Windows to a partition without a USB stick.
Disable hibernation to free as much space as your amount of RAM.