LOLz in Windows XP registry, I've got a little over half a megabyte of custom registry tweaks that I've carefully crafted for Windows XP systems, to streamline it to the max, lock it down and make it about as private as humanly possible. Almost a whole megabyte if you count my MicroXP specific tweaks.

I even made sure to disable Terminal Services, Background Intelligent Transfer Services, Automatic Updates, File and Printer Sharing, and basically any useless service that anyone in their sane mind should disable if still using XP for whatever reason (mostly virtual machine use here).

Anything past XP in a VM for legacy software, I'm running Linux Mint MATE as my actual daily runner.

Still funny you'd say that seasoned Windows users never tweak the registry, I ate it up and spit out the whole system configuration the way I wanted.