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On my laptop I've got - Windows 7 (NTFS), Ubuntu 10.10 x64 (ext4) and a few NTFS partitions which are also mounted under Ubuntu.

1.Today when I opened console text like this appeared: "I don't know you". In Users and groups there was nothing! No users, no groups! I've rebooted PC and then it could not boot - error while mounting filesystem and cannot open password database. I've booted from Live cd, /etc/password was corrupted so I've used /etc/password- file. Linux booted successfully. On ntfs partition I've found strange files: fileX.ntfs-3g-0000000002 fileX.ntfs-3g-0000000003 ... ntfs-3g-0000000154.

  1. While ago after work under linux, when I booted into Windows appeared screen with disk error checking - after scanning some files from the disk disappeared.

  2. I've checked disk with a few S.M.A.R.T. checking tools - everything seems to be OK. Tool from BIOS (ThinkPad) for checking disk and disk controller found no errors.

  3. While booting Ubuntu after hibernation appears errors (but it still boots):

    enter image description here

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You have either a disk error (failing hard disk, loose cable, …) or bad RAM (which could explain that render error as well). Try running memtest overnight (from the Grub boot menu). Look for disk-related errors under /var/log/kern.log (or maybe /var/log/kern.log.0 and so on for older messages), if the files have survived. – Gilles Dec 18 '10 at 0:05
After 3:31:01 Memtest hang (after 3 passes, no errors, but it does not respond...). – mich Dec 18 '10 at 15:20
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