HFNetChk.exe v. 3.86 is the latest version of Microsoft's well-known free command-line tool from Shavlik Technologies that enables you to scan your network for missing security patches. HFNetChk.exe is the multi-threaded command-line tool you can use to assess a computer or selected group of computers for the absence of security patches. You can use HFNetChk to assess patch status for the Windows NT 4.0, Windows NT Terminal Server, Windows 2000, Windows XP operating systems, as well as hotfixes and service packs for IIS 4.0, IIS 5.0, SQL Server 7.0, SQL Server 2000 (including MSDE), Exchange Server 5.5, Exchange Server 2000, Windows Media Player, Front Page Server Extensions, Microsoft Java Virtual Machine, Microsoft Data Access Components (MDAC), and Internet Explorer 5.01 or later.