To download and install the VMware vSphere Client 5.5 on Windows 10 (64-bit), follow this guide. Note that vSphere 5.5 reached its End of General Support
Check the box for and select Windows 7 from the drop-down menu. vmware vsphere client 5.5 download windows 10 64 bit
Running vSphere Client 5.5 on Windows 10 64-bit introduces risks: To download and install the VMware vSphere Client 5
Here is how to bypass it.