|Ok, here are the last things i have done!|
I broke my warranty sticker to open the PC. SATA drive is connected to SATA1 plug which belongs to the intel's ICH5-R contrller. The south bridge is 82801ER. Nothing strange up to now. I saw that W2K3 recognizes the IDE/ATA controller as 82801EB. This seems to be the problem! I went to intel's site and downloaded the last version of intel chipset installation utility, which they claim is also for W2K3 and chipsets up to 925X. I have installed the utility! It requested to restart the PC. After system start up, nothing has changed. I started the new hardware wizard, but nothing new was found. I tried to update the driver of IDE/ATA controler from Device manager, but W2K3 didn't found more suiable one. I tried to choose one manually, but the only compatible devices were just 82801EB that W2K3 has listed. Shortlly speaking, W2K3 was behaving such like nothing has happend. I am really stucked up now!!