I ran into a strange problem when trying to install some software on a Win 2003 Guest. During the middle of an installation the program threw an error saying the CD-ROM was no longer available. I took a look at "My Computer" and the CD-ROM had just vanished. Nothing I do short of rebooting would bring back the CD. I thought that the incident may be some kind of fluke, so I tried installing the application again and the exact same thing happened. I ended up creating an ISO image of the CD and mounted it in Windows. The installation went fine as long as I did not use the physical CD-ROM. I've installed plenty of other programs in 2003 and many of them were much larger than the application that I was trying to install. Applications like ColdFusion MX 7, MS Office 2003, Acrobat and SQL Server 2000 went off without a hitch. The only difference that I could tell is that it seemed like the application was reading and writing a lot of small files. So, this bug may be related to the quantity of read/writes rather than the size of the application. Of course it could be something else completely. My setup is a Mac Mini Core Duo, OS X 10.4.6, 2GB RAM and Parallels GA. Anyone have any ideas why this is happening?