Hello Tony,
I see that you have updated your environment o the latest release ofvSphere but you are not clear with some other specifics.
Could you please provide the below details:
-What is the Guest OS : XP, 2k3, Win7, 2k8 ?
-VM Hardware version : 7 /8 /9 ? (this should not matter) , regardless of this tools hsould get upgraded , except some devices will not be present from one H/W version to other version.
-What is the previous version of ESX (assuming you installed the tools from the same ESX version on the guest.)
You seem to update tools using VUM ?? Can you try to use the vSphere Client and then click on Automatic upgrade of tools option from the VM menu.
- :smileyhappy: -