What does CHKDSK error "Replacing invalid security id..." refers to
I have a Dell laptop. It is some XP M1710 system. It has Windows Vista 64bit OS. It is working quiet fine. I am using for backups. It is scheduled regularly on automatic basis which is 2 times in a week. I using Norton Ghost 12 for that. The laptop has all updates installed and Ghost looks to be working fine. As the backup is scheduled two times in a week, it stucked @ 40%. The backup takes time but it finishes, and I am noticing from last 2 hours that it is not crossing 40%. The average time of backup is around 90mins. So to ensure everything is all right I canceled it and run chkdsk command to verify my disk integrity. After running chkdks I found that there are around thousands of messages in the command prompt which say some security id invalid. The message keep on appearing. When I search on Microsoft website about the error I found this occur mostly for Windows Servers. Chkdsk is still running. Is this fine or there is some issue with my system.
re: What does CHKDSK error
Let it complete first. I think your system has cause some major issue with system files. And that is due to incomplete or corrupt backup files. Norton Ghost is a nice utility, but when it fails it takes down the entire system. I face this issue on my server where more 100,000 errors are listed and the system just crashed. There was nothing on the screen on reboot. Never cancel those backup things. You will loose your existing data also. You must let Norton Ghost to take as much time as it needs to run the backup.
re: What does CHKDSK error
That's a risky business. I do not use Ghost and it is a bit not reliable. Ghost modifies system parameters. It keeps the exact copy of your system partition but if something wrong happen blue screen is the most common cause. Unlike other backup software, if Ghost is screwed up your system also goes with it. And above all you are using the buggy Vista, and that too a 64bit edition. If your desktop does not loads try system restore in Safe mode or through Startup Repair. If somehow it restores your system, run the backup back. That might save your day.