I use a few tools, but one of my favs is AD Info. It is a free tool (with paid options), and can poll AD for computers. Things you can check for is last login (PCs timestamp as well) or boot time, OS version etc. I am not good at writing the AD queries, and this does it for you. Tim From: Stefan Ozminski [mailto:[log in to unmask]] Sent: Sunday, November 30, 2014 5:23 PM To: [log in to unmask] Subject: [MSUNAG] Finding Windows XP computers by NOD32 anti-virus remote administration FYI: Anyone that has a NOD32 anti-virus Remote Administration server set up can produce a list of computers administered by the server. That list can be exported as a csv file and it can include the operating system retrieved by the anti-virus client software. The data are available whether the clients are online or not. This method is not dependent on the computers being part of a domain and it is not dependent on Windows remote administration being enabled on the client. I used a list from NOD32 Remote Administration to cross reference the list of Windows XP computers that I retrieved from Active Directory (the comparison was done by taking advantage of findstr.exe /v /i /g). The NOD32 Remote Administration database, similar to Active Directory, retains computer names even after the hardware has been decommissioned, so I had some cleanup to do in that list as well. -Stefan