>>1906If you're on Windows XP, there's not much to it. It's rock solid as an OS and it doesn't actively spy on you. Probably the last sane (and usable) OS from Microsoft.
For "hardening":
- Disable all unnecessary services especially ones that open ports. You should be left with a few essential ones running (RPC, audio, network).
- Disable NetBios (system driver, device manager, view hidden, find netbt) to shut 445.
- Disable DCOM (with GRC's DeCOMbobulator) to shut 135.
- At this point you shouldn't have any open ports listening.
- Disable Windows Update.
- Block Microsoft/Windows/Update domains with DNS or hosts file.
- Optional: Get a VM with Win 7 to run newer or untrusted software. Microsoft fucked up the executable format compiled on newer Visual Studios to force XP users to "upgrade". There's a DLL entry-point fix in the works similar to the one for W2K but I'm not holding my breath.
I found it impossible to harden anything Vista onwards although telemetry is essentially neutered by DNS blocking and the processes themselves can be stopped by spending some time in the Task Scheduler, Group Policy Manager and a few registry tweaks. The OS itself is still nasty and I wouldn't recommend it. If you still insist on using it and have the rectal fortitude required, enable the Admin account first thing and log in using that or Uncle Bill will push you around (it still will).