The End of Support Calendar shows Microsoft Operating Systems end of support dates, whether they are the end of mainstream support that updates features and cosmetic changes, or extended support, which ends security fixes and all Microsoft technical support other than old web pages.
TLS 1.0 Security Protocol
TLS version 1.0 will fail PCI Compliance rules after June 30th. This is a security protocol and encryption method, long known to be flawed, but broken only with considerable difficulty. It should be replaced with TLS version 1.2 or above. TLS 1.0 can be disabled in Windows; there is a setting in the Control Panel of Windows 7 and higher. It's under Internet properties, advanced, security, uncheck SSL 3 and TLS 1.0, add checks to 1.1 and 1.2 if not already there.