I hit a couple snags.
I quickly enabled XP mode.
Then came a message about .net
Then I found the following blog post!
Windows 8 – Installing the .NET Framework 3.5
dism.exe /online /enable-feature /featurename:NetFX3 /Source:g:\sources\sxs
from an administrative CMD. “g” is the drive where you have your win8 installation files.
so for me, It was the following steps.
1. run cmd as Administrator.
2. dism.exe /online /enable-feature /featurename:NetFX3 /Source:d:\sources\sxs
3. Reinstall vSphere Client.
I hop this helps anyone trying out Windows 8.
Thanks for reading!