Hi Tomasz86! Thanks for such a quick reply. Yes, I am using it for a server and therefore stability and reliability is the number 1 & 2 concerns. So, you answer your questions: I was thinking of going the direction of: W2K SP4 > UR1 (official) > updates The thing is, I'd really not want to have to manually download all 400+ updates unless a program like Autopatcher will do it for me? And the only reason why I was considering USP 5.1 was because it included IE 6, OE6 natively, which I hear is rather complicated if you attempt to do it on your own. Lastly, other than Bristol's list; where can I find out a list of all post-SP4/UR1 updates? I'm mostly thinking of the ones which are unofficial... Thanks, -D P.S No advice of FW/AV for 2k?