Realtime antivirus software for Windows Server 2008 R2 Add a comment. 1. Newer versions of Forefront Client Security will install on Windows Server 2008 R2 x64. I just finished an install today of a standalone, get-updates-from-Windows-Update installation of Forefront Client Security on W2008 R2 and it worked fine. Note that you'll need to run the clientsetup /nomom in the \CLIENT\x64\ directory of ...