My problem system was a 2003 server from a P to V over a year ago – all was well until attempted vmtools update. Video and mouse were solved by adding default RunOnce key to HKLM/Software/Windows/CurrentVersion, reboot and uninstall/reinstall VM Tools – reboot. NIC was resolved by uninstalling hidden leftover NIC (from PtoV) from device mangler
Click View/Show Hidden devices
and uninstall the ‘ghost’ entries.
- removing and readding VM NIC – re-ip new NIC