I have these four files on my system partition's root drive all indicating 0 kb as their file sizes. The file names are AUTOEXEC.BAT, CONFIG.SYS, IO.SYS, MSDOS.SYS and can only be viewed when protected system files are not hidden. A scan with avira says the files are clean. Trying to upload online to virustotal for a 2nd opinon is futile since it seems the site doesn't handle zero byte files. Are these files safe? nLited XPSP3 OS btw with up to date windows patches.