|I'm guessing English isn't your native language?|
The CPU is an AMD Sempron, not a Sampron. And why would you format a HDD in one PC & then install it in another? That really shouldn't matter matter as long as you perform the Windows installation in the PC you're going to use the HDD in.
If you installed WinXP on the HDD while it was in PC #1 then swapped the HDD into PC #2, it's not going to work properly because the Windows installation is configured for PC #1.
And Ewen is correct, 256MB isn't enough memory for XP, it's going to run like sh!t.