Do you have "Finder -> Preferences -> Advanced -> Show all filename extensions" enabled? Virtual machines in Parallels Desktop 5 usually have a .pvm extension. Use the following to list everything in your virtual machine and to dump the contents of the DiskDescriptor file: Code: ls -lRd ~/Documents/Parallels/XP* ls -lR ~/Documents/Parallels/XP* ls -l ~/Documents/Parallels/XP*/*.hdd/DiskDescriptor.xml cat ~/Documents/Parallels/XP*/*.hdd/DiskDescriptor.xml ls -l ~/Documents/Parallels/XP*/*.pvs cat ~/Documents/Parallels/XP*/*.pvs | grep .hdd What do you mean by "it"? Wenesday was yesterday or do you mean 8 days ago? How is that possible if you've been having the problem for 4 months? Please provide context in the form of a screen shot if you are unable to explain what your are doing or what is happening. Let's just try to get the .hdd working with Parallels Mounter first. It sound's like 1) everything was working 3 days ago and that you didn't have the "unable to connect to hard disk 1" problem then. 2) you updated to 9376 and were able to boot the virtual machine into Windows and reinstall the latest Parallels Tools that came with 9376. So if (1) is true then what "unable to connect to hard disk 1" problem were you hoping to fix by updating to 9376? I am assuming you have only one virtual machine (XP Pro) with only one virtual hard disk (winxp copy 1.hdd) which is Hard Disk 1 in the virtual machine configuration and Hard Disk 1 contains a bootable Windows XP. Provide a screen shot of the Hard Disk 1 setting in Virtual Machine -> Configure -> Hardware -> Hard Disk 1.