When Microsoft Corp. launches Virtual PC 2004, a Linux version of the software won't be along for the ride—at least not officially.

Microsoft confirmed to eWEEK.com that an upgrade to Virtual PC—software it purchased from Connectix Corp. in February that lets enables users to run multiple PC-based operating systems simultaneously on one workstation—is close to being released to manufacturing. However, the new version will no longer offer official support for BSD Unix, Linux, NetWare or Solaris on Intel.