VMware Workstation 4Features | Documentation | Knowledge Base | Discussion Forums
When VMware Tools is running, you can cut (or copy) and paste text between applications in the virtual machine and the host computer or between two virtual machines. Use the normal hot keys or menu choices to cut, copy and paste.
To turn off this feature - to prevent accidental copying and pasting from one environment to another - change your preferences.
Choose Edit > Preferences. On the Input tab, clear the check box beside Enable copy and paste to and from virtual machine.