Well this is the rig: Intel Celeron 1.6GHz 40GB HDD DVD-CD-RW Windows XP SP2 Home ATI Xpress 200 256MB RAM DDR2 well, so this is what happen: once in a time this laptop come into a hang and it freezes. i try to wait and shut the computer down straight. Well, it was like a racing snail, but after reboot the computer seems to be worse. Then i found out that the HDD is set to PIO. The problem is i can't change the mode from device manager. Anyone know how to change from registry (probably)?