Hello, So, I have an old HP Compaq nc6000 machine, month ago my HDD died due to bad sectors(HDD wasn't changed from factory before), I've changed it to Fujitsu 40GB Drive, installed XP, and started encountering strange problem, Windows loses system files(on almost every bootup), tried to reinstall windows 5 times, Windows is Genuine(from OEM sticker) XP Professional SP3. Tried to launch chkdsk /r from recovery console, it doing something on 4th and 5th stages, starting from ~60%, and says that there were errors on the volume. I have tried to do a low level format using Fujitsu utility, no bad sectors found, tried to scan with HDD Regenerator, no bad sectors found, ever ran memtest, everything is fine and even flashed BIOS it already was F.15(newest one), did that from windows. Checked SMART, only "power on hours count" is below its limits. As far as I understood, I'm encountering NTFS file journal erros(because HDD wasn't shut down properly) but I don't understand if its Windows/BIOS or hardware related issue, and I need solution(change the HDD isn't the best one, because it seems to be ok).And I almost forgot, sometimes it even doesn't see my MBR, but after chkdsk command finishes, MBR seems to be fine, but always after checkdisk I'm doing fixmbr. Thanks in advance, Gabriel.