This program deals with a security bug brought up by l0pht (www.l0pht.com) concerning DHCP and a way of modifying a Win95/98 (WinNT and Win2k do *NOT* have this security problem) machine to redirect all of it's packets through another computer, more than likely something you do NOT want to happen. This only really affects you if you use DHCP, and it is especially important to have this fix if you're using a cable modem, DSL, or some other type of 24/7 connectivity.
The program is very easy to use, just run it, and it will either tell you 'Enabled' or 'Disabled'; Enabled meaning that workaround that Microsoft suggests is in place and functioning on all your network interfaces, while Disabled means that the workaround is not running, so your system is susceptible to the security hole.
You can find out more information about this particular problem at the l0pht website (it has a very good writeup of what exactly happens, with pointers to fixes). Of course, I wouldn't even have known about the problem if it wasn't for 'The Screen Savers' (www.thescreensavers.com), on ZDTV... Whoever said watching television isn't productive must not have gotten this channel! :)