I came across this when I was setting up a VM of XP Pro SP2 that was supposed to be an exact copy of what a customer company was running.
So I set it up to be Finnish for settings and location and keyboard.
(Usually I set all the settings to UK English (or leave at US English) except for the Keyboard and then go in and amend by hand the decimal points; commas etc. which are all wrong.)
Anyway it as usual warned me that I didn't have virus-checking software installed and I asked for its list as usual.
To my amazement instead of the 8 or so companies that are usually listed, only three (F-Secure - which is a Finnish company; Panda and something else) were listed.
So watch out for this. If you are not installing your Operating System with US English settings you may well be missing out on the number of different virus-checker systems that you are told you could use.
In my case I've learned that I can just go to http://www.avg.com; select Trial and just download the file (with no registration needed) and I'm good for a month. (and that of course works even with Finnish settings)