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Have to run chkdsk twice for it to scan properly

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Senior Member
Dec 27, 2008
After running system file checker on all the classroom computers in a private school I provide tech support for, I am also running chckdsk /f /r. There are about 25 computers involved, all with Windows 10 installed and with all latest updates from Microsoft. These are older machines with a lot of hours on the hard drives. I have checked the SMART info on all machines and replace the drives that were in failure.

On all but about two of these machines I am finding I have to run chkdsk twice in order to get it to scan correctly. The first time the machine reboots, starts to run the chkdsk scan but immediately runs to 100% complete whereupon it boots back into Windows. When I issue the chkdsk /f /r command again it will reboot and run the full scan in a normal fashion over a period of sever hours. To have to issue the command twice is so frustrating and time consuming. These machines are old take a long time to boot.

What is happening here?


New Member
Dec 4, 2011
Satan's Colon, US
That's a new one for me, although I have had to run chkdsk multiple times to get it to actually fix all the problems before. More often than not, actually.