FOLDER OPTION PROBLEM

I HAVE LOST FOLDER OPTION IN TOOLS MENU DUE TO VIRUS PROBLEM. I HAD REMOVED ALL VIRUS FROM PC AND I GET FOLDER OPTION BACK FROM GPEDIT COMMAND. BUT I HAVE STILL PROBLEM. WHEN I CLICK ON SHOW ALL FILES AND APPLY BUT IS DOESN’T WORK.EVERY TIMES I APPLIED BUT WHEN I CHECK AGAIN THEN THE DOT IS ON “DON’T SHOW HIDDEN AND SYSTEM FILES” I HAD RESET ALL FOLDER BUT NOTHING EFFECT.PLEASE HELP.