Removed Restore Part, now won’t Boot

I have wiped out the restore part on my compaq presario S5000v. I put OS’s on the machine twice, but neither would boot. (Once a clean XP Pro install, once a Nero backup restoration.)

I always have these probs with HP/Compaq, and should have known better to try it with this one.

Why do HP/Compaqs never allow me to to put on the OS I choose?

This is my PC- not Compaqs or HPs. How do I take control of these things once and for all?

No other machine ever gives me difficulty. If someone could explain to me how to thwart this tyrrany I’d appreciate it.