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To summarize, the full command that should be typed into the Command Prompt or PowerShell is: chkdsk
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It changes the size of the resulting log file to the size you type.
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The basic invocation of CHKDSK, simply “chkdsk ”, will scan the disk and display status information, but it will not fix any errors that are encountered. Reboot into recovery mode to perform the scan or create a Windows Recovery Tool, to perform the process. If you’re having issues with running the above command because the drive is in use by another process, that because you’re trying to scan your primary drive (boot drive), when it’s being used by the OS.You can also type “ chkdsk /scan” to scan the disk online and attempt to repair it. Now, type “ chkdsk c: /x /r“, without the quotes, to dismount the drive, scan it for errors, and repair it.The next screen to appear is a User Account Control (UAC) window which will ask for permission to launch the Windows Command Processor and let it make changes to the PC.Right-click the Start menu and select, Windows PowerShell (Admin).