I know XP is no longer supported, but was told Vista was still supported, but cannot download Cloud trial. Was the info incorrect?

Had to get a new comp to replace one that burned out. Had to go used, but..It is loaded with Vista, which I was told was still supported by Adobe and could easily download PS Cloud. However, this does not seem to be the case, unless I am missing something. However, I get the error message that my platform is no longer supported. What's up?? I know XP is no longer supported, but.....Vista??