I have 3 admin accounts. One for daily use, one for tests/experiments and one for emergency.
( Sorry, I don't buy the " don't use admin account for daily chores " advice. )
My regular admin account has WLM 2009 version.
I tried to install WLM 2011 in my test admin account. It gets installed ok, but when I logon back to my regular admin, my WLM has turned to 2011 version.
If different user accounts can use different e-mail clients, why can't different user accounts use different WLM versions ?