Hi, I am assembling a new PC with the following material:

Processor: AMD Sempron 2600+
Mobo: Asus K8S-MX
Mem: 512 Mb
Hard Drive: Hitachi IDE 80Gb
Optical Drive: Samsung CDRW

The motherboard seems to detect the HD in the bios, but when i start to install Win XP, after pressing the ENTER key to proceed with installation, the computer hangs on. I tried to install Windows in this disk using another computer and when i installed the HD in this one again i had an blue screen with that said something about an HD configuration error.
Don't know what to do now, i'm thinking to change the IDE HD by a SATA one.

Welcome to TechSpot

It does sound like you are having HDD trouble.
I recommend tryin a disk util from Hitachi.
You might wanna try putting Hdd in another
system and do a low level format (writing zero's).
it may be able to find & lock out any bad sectors
on the drive.
I'm runnin a WD 80g Sata drive as my primary
drive and it works great!
Though make sure you have SATA drivers
(for your MoBo) on a floppy, when you
first boot from cdrom to install windows
right away you'll be asked to press f6
to load third party scsi drivers. then follow
instructions on screen.
G'Luck!!

Ok, solved this issue.
An BIOS updated was all that was needed.