my folders in hard disk are replaced with folders and files with name "[É╪7╢ª┴.⌡=v" and similar kind of irregular patterns. the folders are un openable. all the data is un accesable. even the hard disk free space used to be around 450GB now it turned out to be 589MB. i have scanned the hard disk for virus with bit difender and avg but cannot find anything. please find a way out. i have gotta very impotant data over the hard disk and it is the only copy