I upgraded one of my computers to Windows 8 today. It seems the Windows 8 Upgrade Assistant had falsely led me to believe that vSphere Client 5.0 was compatible with the new OS, when in fact it wasn’t.
Try as I might, I just couldn’t get it to install and compatibility mode was of no help either. I tried a few other things too but let’s cut the chase and get to the point here.
In my search for a solution I came across a blog post with direct links to a number of vSphere Client installation files. I can confirm the vSphere Client v5.0 Update 2 is compatible with Windows 8.
UPDATE: This is also works with Windows 8.1 RTM
UPDATE: This is also works on WIndows 10 1507, 1511 and 1607