Get-ItemProperty -Path "hklm:\SOFTWARE\Symantec\Symantec Endpoint Protection\CurrentVersion" -name productversion
…gets SEP version
get-content (join-path -path (Get-ItemProperty -Path "hklm:\SOFTWARE\Symantec\Symantec Endpoint Protection\CurrentVersion\Content" -name virusdefs | select -expand virusdefs) -childpath definfo.dat)
…get virus defs version