Windows 10 is not out of the box supported on ESX 5.5, unless you're running 5.5u3. One of the issues is that earlier versions do not have a compatible video driver for Windows 10.
However, for older versions of ESX 5.5, you can manually download the VMWare Tools and install them:
→ https://packages.vmware.com/tools/esx/5.5u3/windows/index.html
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