A. You can't connect because an ISO file larger than 2.2GB is a DVD ISO file, not a CD-ROM ISO file. Virtual Server 2005 Service Pack 1 (SP1) will add support for ISO files over 2.2GB. To resolve this problem, simply mount the ISO file on the host computer by using a CD emulator product such as Microsoft Virtual CD, which you can download here . Then under the Virtual PC environment, link the CD-ROM drive to the "physical" drive created by the virtual CD software, for example Z, which the figure shows