Here is how to bypass it.
Users who attempt to install the original vSphere Client 5.5 on Windows 10 encounter multiple issues: vmware vsphere client 5.5 download windows 10 64 bit
Share your build number and any additional fixes in our community forum. Legacy infrastructure may be old, but it doesn’t have to be left behind. Here is how to bypass it
Windows 10 is not natively listed as supported for this version, so you must use these steps to ensure a successful setup: vmware vsphere client 5.5 download windows 10 64 bit