The attrib command is the closest match for very basic things (read-only, archive flags). Then there is The ACL (access control list) command cacls. Last but not least, since Windows is actually Posix compliant, the unix-like flags do exist. If you install the Cygwin tool set, you will get a chmod. (A little off-topic, since you are looking for an equivalent of a unix command, downloading and installing Cgygwin might be something interesting for you.)