Windows XP
Windows XP
It's feasible, though you can start with Windows 10 and switch to XP inside a virtual machine. This setup lets you run the OS safely online if you stay cautious, and you won’t require updates if the system stays offline or connected to a secure network without active data transfer.
It's certainly feasible, though unlikely. The process would be highly challenging and probably unprofitable. Security would be significantly weaker compared to a proper update, since only a small group might be involved instead of the full Microsoft team. In short, it's possible, but it won't occur.
It seems like creating a simple program feels too basic for someone trying to build something real.
Most of the Windows XP source code has been exposed, allowing patches and recompilation. However, this requires expertise as a kernel developer.
There are many self-teaching options available; we’ve created a detailed discussion for sharing useful resources.