Hi, I came across a very strange problem, which I'll describe like this: On a new machine with Nvidia Nforce4 chipset, AMD Athlon 64 X2 3800+ (dual core), and a SATA2-2 disk Windows/XP stops booting after _significant_ harddisk IO (as from the perspective of the HD LED). "Stops" means the rotating progress bar freezes after some time, and I#ll have to press reset. Now what's interesting: It only happens when I had booted Linux before. I can only suspect that it's either related to Linux doing something with the SATA controller that BIOS & Windows don't undo, or it is the activation of the second core of the CPU that makes Windows freeze on boot, or whatever. Windows event log is reporting "disk" errors after a successful boot then My BIOS is completely up to date. What makes things worse is the fact that neither hdparam nor smartctl seems to work with SATA (only tried 10.0). Any progress in thios area? Any ideas what the reason of the problems could be, or what to do against it? It's bit annoying. Please no suggestions like "remove Windows". Regards, Ulrich