hi folks, well, got this strange HDD problem> not actually mine, but cousin's PC, .. nothing major was going on some programming, web browsing etc }no major HDD activity at that time.. then (then at least what cousin claims had happened) there was some strange noise (but not "clicking" possibly something like "scratching"). suddenly screen turned black with some error message about reading from HDD. We restarted the machine, HDD was detected properly, XP started to boot up but just before the logon screen it restarted....and it kept doing so after several attempts. I suggested running CHKDSK, so we did run a CHKDSK from windows installation CD recovery console .. 1st level of CHKDSK (without the checking for bad sectors) was completed, then we were able to boot up to safe mode with no apparent problems, booting up XP normally resulted in long loading time and then catastrophically slow performance (5minutes black screen, 5minutes black screen with cursor, 5minutes log-on screen...)...CHKDSK with bad sector checking attempted - froze several times after running slow for a while....HDD removed, plugged in another PC.... well, I actually managed to complete CHKDSK this time (still slowly)..HDD plugged back to the original machine...XP booting succesfull, but still slow performance ... I've measured the performance with the bench tool of PCWIZARD, and it showed poor values on both partitions. However, No actual data damage observed and the HDD is almost full.and no another strange noises since the crash, or any other problems except the poor performance (I actually ran defrag, it took whole night for 100gigs 65%full, didn't help...) ANy comments and suggestions will be appreciated, of course I've got some of my own (backing-up & formatting, so on... ) THNX ans sry for such long text