Also, keep in mind this thread was for Paralles 7 not 8 and was mostly posted during the developer previews. Since the GM of Mountain Lion, Parallels has released a version of 7 without these issues and a new version 8. Your issues will likely be fixed by a total reinstall. Make sure to get the kexts out of \System\Library\Extensions\ and the Parallels folder in \System\Library if the remover doesn't. Reboot in between uninstall and reinstall.