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Try disabling 3D acceleration in Virtual Machine -> Configure -> Hardware -> Video.
Windows can only see partitions that are in the MBR. Macs use partitions that are in the GPT. First make sure the MBR contains the correct set...
Quit Parallels Desktop. Then find all the Windows apps folders and delete them. When you run Parallels Desktop again, it will rebuild just the...
Disable the features that you don't want to use anymore in the virtual machine configuration. View -> Window mode. Virtual Machine ->...
You can remove the virtual machine from the Virtual Machine List window. It will ask you if you want to move it to the Trash. If you click no, it...
Did you remove the virtual machine from the Virtual Machine List window first so you don't get duplicate virtual machines when you re-add it from...
If you use Bridged Networking then your virtual machine will behave like a computer on the same network as your Mac. If you use Shared...
Search the forums for PRL_ERR_OPERATION_FAILED to get some suggestions. http://forum.parallels.com/showthread.php?t=104323
Did you try reinstalling Parallels Tools?
Run Activity Monitor and see what process pid 399 belongs to. Maybe run repair permissions. Maybe reinstall Parallels.
Select the virtual machine in the Virtual Machine List. Right click and select "Show in Finder". Right click the .pvm in the Finder and select...
I assume Parallels changed it because the new one is better in some way but I don't know how.
You need to delete stuff on the Mac side. If you can't find stuff to delete then you need an external hard disk. Do you have another Mac with free...
Remove all your virtual machines from the virtual machine list but don't move them to the trash yet. Go into your old virtual machine file...
Try the suggestion at http://forum.parallels.com/showthread.php?t=105026
Disabling the 3D acceleration in the Virtual Machine Configuration Hardware Video settings might fix the corruption but probably not the graphics...
Try the suggestion at: http://social.answers.microsoft.com/Forums/en-US/w7security/thread/99d4fe75-3f22-499b-85fc-c7a2c4f728af/
Windows XP is installed on a virtual hard disk of a virtual machine? Are you installing Windows 7 to the same virtual machine or a new virtual...
You have some snapshots. Go to Virtual Machine -> Manage Snapshots. Select a Snapshot and click the Delete button. Disable Smart Guard if you...
You don't need a Mac driver to see the printer in the virtual machine's workgroup. Do you see the printer in the virtual machine's workgroup? Are...