How do I determine which version of IIS / ASP I'm running?

1. If you are running Windows Server 2003, you are running IIS 6.0 / ASP 3.0 (though some people like to call this ASP 4.0).
2. If you are running Windows XP, you are running IIS 5.1 / ASP 3.0.
3. If you are running Windows 2000, you are running IIS 5.0 / ASP 3.0.
4. If you are running Windows NT 4.0 or Windows 9x, you can determine which version of IIS / PWS you are running by one of the following methods:
   

response.write(Request.ServerVariables("SERVER_SOFTWARE"))

' returns "Microsoft-IIS/4.0" for IIS 4.0 + ASP 2.0

OR

Look for Windows NT 4.0 Option Pack in Add/Remove Programs (Control Panel). If it is there, you are running IIS 4.0 (NT Server) or PWS 4.0 (NT Workstation or Win9x).

OR

• Do a search for ASP.DLL on your system
• right-click it and select Properties
• Check the version tab:

IIS 3.0 shows 1.x
IIS 4.0 shows 2.x
IIS 5.0 shows 5.0.2195.x
IIS 5.1 shows 5.1.2600.x
IIS 6.0 shows 6.0.3790.x

And........... Windows Vista uses IIS 7.0 :-)