I was playing with Security Options on the COM+ Services. I was having a problem at work with this and was trying it out with my Windows 2003 Server installation (my main system). The problem was that a remote application wasn't connecting to COM+ server which both the client and the server was on the same domain.
In an attempt to solve this problem I have fiddled with every permission settings available on the server. Finally I've came to this screen and dissallowed Everyone from accessing to this COM server and let only System user access everything (screen shot taken from my Vista installation later) thinking that it will be more secure by this way. My Windows 2003 Server (RIP) died after this as I couldn't get into any property pages and couldn't even copy paste files in Windows Explorer.
Lessons learnt. Never ever fiddle with permission settings on COM+. The only advantage of this event was letting me install Vista. I've copied all my personal data to my ReadyNasNV+ with 7Zip and dived into Vista installation. I was going to wait till I get a better laptop but WTH. I like installations but not in the middle of projects and a busy life. Anyway, I have installed Vista Business and also Office 2007. I was telling before that I switched to Thunderbird but now I switched back again to Outlook which was like a warm wellcome for me.