We have three virtual servers on a server using Microsoft's Virtual Server 2005 R2. Last night, we rebooted the host and the three virtual machines. The host and one virtual machine came back up. The other two virtual machines are stuck at the Windows splash screen. We can get into safe mode with those machines but cannot make it to normal windows. Before we rebooted, Windows updates were applied to all four servers. I believe the exact same windows updates were applied to all four servers. We have tried uninstalling updates from on of the virtual machines that won't boot but it didn't help. It is still stuck at the Windows 2003 splash screen. The only other thing that was done to the three servers was the installation of Acronis backup software. Again, that was done to all four servers and two booted up fine. Can't uninstall that in safe mode but we did disable the services.The ntboot log says that both servers hang on the fastfat.sys file. Tried replacing that file from a working server but no go.
Does anyone have any ideas here? The two servers are not very critical but the sooner we get them back up, the better.