this may be in the wrong category, but is there a way to run windows sfc on a drive that is not currently the system drive? example: system A is not bootable, and i suspect that its a corrupted file that is required in the boot process, i want to put the hard drive from system A into system B or attach it externally and scan it to see that all required boot files and drivers are intact, if not, it replaces them w/ fresh copies, is that possible?