Downloads Download Microsoft IIS 4.0 and 5.x By admin On Apr 12, 2002 Spread the love Ragger informed us that Microsoft has released security patches for IIS 4.0† IIS 5.0 and IIS 5.1† These security patches ensure that a number of vulnerabilities are a thing of the past. Internet Information Server 4.0 Internet Information Services 5.0 Internet Information Services 5.1 Version number 4.0, 5.0, 5.1 Operating systems Windows NT, Windows 2000, Windows XP Website Microsoft Download