Install Netbackup 6.5.6 on Windows Server 2012 R2

Is it possible to install very old version of NetBackup 6.5.6 on Windows Server 2012 R2?

We are virtualizing all windows servers and I will use Veeam to backup them up; however, I have a few unix/linux boxes that I will have to use Netbackup 6.5.6.

Thanks for all your help,

Mark