Hello! I have lots of problems with my hard disks. CHKDSK finds errors in the values every the time in my 2 hard disks even after running a CHKDSK/f!! Also I can't install games from CD/DVD's because there comes always "read error in file x" or "unpack error in file x" or a "CRC-error occured...". Also corrupt program files: almost any program might stop working, this happens every day. It can be Skype, WMP, RealPlayer, Itunes, Mozilla Firefox.. You name it. Even WIN XP self complains about many problems (at least once a week). I have SP2+latest updates, use a Antivirus+firewall and Ad-Aware +some other similar programs can't find any problems. I had a Samsung harddisk P120 (250GB) which had these problems, then a bought another one (because I thought it was broken), a WDC hard disk and installed Win XP to that instead but the problems still occured like before. What should I do, are there any good diagnostic programs? Please help me, I can't stand the situation anymore! With regards, a novice! My system is: Intel C2D E6400, Corsair PC5300 DDR2 2048 MB, Samsung Spinpoint P120 250 GB, WDC 250 GB, Nec DVD-burner AD 7173, NorthQ 4775-500Bulk(500W), Gigabyte DS-3, Powercolor Radeon x1950Pro EE 256 MB, Win Xp Home, Cooler Master Mystique 631 Viewsonic VA912, MS Wireless Laser desktop 6000.