There are a few CMS / Blog compare / contrast sites around. That being said you might want to play with Tiddlywiki on your desktop. It is very fun to play with... tiddlywiki.com
''''Warning --- attempt humor''''' Fortunately I haven't had to consider Windows as a server platform option for a few years So I'll not be able to help you with ease of use
You might also want to check out the WAMP server project http://www.wampserver.com/en/
That should make it easier for you to install Apache - Mysql - and PHP5 on a Windows machine should your CMS / Blog require those servers
James
-----original message-----
>>I am researching blogs and hoping I can pitch to senior management the idea of an internal blog. Unfortunately, I'm not sure where to start. Any suggestions on any free blogging software that could be painlessly installed in a Windows environment? Perhaps some websites that discuss the techincal aspects? Anyone had any success using a blog internally?>>