Use chknfts /x c: to remove the scheduled chkdsk. But you should do chkdsk after login anyway just in case your drive does have a problem. Run cmd.exe in elevated mode and enter the command chkdsk and please show me a screeenshot of the window. You might be missing autochk.exe and that if that is true, it might be the reason of the error. If chkdsk does not work, run sfc /scannow for Windows to scan for protected files. If any is missing or corrupted, your computer will replace them with a fresh copy. But if you have modified the system files before, the modifications will disappear.