That Applet only comes with .NET2.0 SDK Since VS2008 will install
.NET3.5, which in turn installs .NET2.0 SDK, I suppose. Since all my
computers have had .NET2.0 SDK/VS2005 installed before VS2008, so, I am
not sure why your VS2008 did ot get that installed.
However, if you can try to install .NET2.0 SDK first and then reinstall
your VS2008 (before reinstalling, you can verify if that applet is there
or not). Or you search your c: drive for "mscorcfg.msc", which is the
applet. If you found, then you definitely has .NET2.0 SDK installed, it
just for some reason the shortcut did not get created in Control
Pabel->Administrative Tools applet.
I have also heard that VB2008 Express version also not set this applet
up. Are you using VB2008 Express? If so, I'd install .NET2.0 SDK first
and then install VS2008 Express.
Here is also a good info in this regard:
http://home.hot.rr.com/graye/Articles/CodeAccessSecurity.htm