Recently, i have upgraded my Domain Controllers to Windows 2008 64-bit. I upgraded my first DC and install SEP v11 on it. Then I was trying to promote my other DC, but then it failed. It was able to promote my second DC when i un-installed SEP v11 from my first DC. Now, I am hesitant to put SEP v11 on my two production DC's. What version of SEP is fully compatible with Windows 2008 64-bit?