Parallels Tools installation fails with error "Failed to install Parallels Ethernet Adapter – error 0x2 (file not found)."
Please perform the following instructions:
Click on Start -> Run.., in the prompt type regedit. This will open up the Windows registry window.
Navigate to the string HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Network.
Right-click on the word Network on the left pane and select "Export" option.
Save the file on the Desktop.
On the right side of the window find the Config item and delete it.
Please try to install Parallels Tools again.