enabled in Windows Features (Control Panel > Programs and Features > Turn Windows features on or off), as the client requires it to function. SSL Errors
If you have the vCenter 5.5 installation media, the vSphere Client is included as an optional component in the autorun menu. Installation Steps for Windows 10 64-bit
Windows 10 may block the older security protocols used by vSphere 5.5. Some users resolve this by using tools like IIS Crypto to re-enable older hashes like MD5 or SHA if your environment is isolated and secure.