In trying to boot up the virtual machine, I get an error message: "The virtual machine cannot start because Parallels Desktop is unable to access the virtual hard disk image file: users/myname/documents/microsoft windows xp/winxp.hdd" this file is missing or corrupted or used by another application. What can I do to load this file...I assume it's to be within Windows? I'm having trouble using the explorer feature in Windows, amongst other things. Imac, 2.4 ghz, 320HD, 3 gig memory, running Leopard with Windows XP through Parallels.