I'm in trouble. "sfc /scannow" says some system files are corrupted and it cannot fix some of them. So I tried "dism /online /cleanup-image /restorehealth", but it says it needs source! Usually it doesn't say so. Where is the source file? a wim or esd file is nice. Fortunately I have made a recovery disk (usb) beforehand, and it has \sources\reconstruct.wim. Is it be available for the source?