Both, my OS and version of I.E. browser comply with the system requirement Skype suggested, but it says “Skype can't connect” as I try to log in Skype! I have upgraded with the latest version too.
Earlier, I had a Skype 6.21.0.104 installed in my computer that perfectlyused to work on XP Professional, SP3 with Internet Explorer 8and now it won't. I know XP Service Pack 3 is notnow supported by Microsoft but Skype was working fine on this OS. Sometime in September 2017 Skype suggested to upgrade its earlier version, and now its website for Windows desktop system requirement suggests supporting Windows XP SP3 32-bit versions, using Internet Explorer 8 or higher but this suggestion does not appear true.
Since very long ago I have been using services of both Microsoft as well as Skype and realised they were more driven by service than by money, unfortunately, it now appears their objectives has changed as it does not commensurate to their earlier objectives. Otherwise,
the suggestion that supports Windows XP SP3 wouldn’t have displayed a message like “Skype can't connect!”
Now I am uncertain how you will address this problem with log in Skype.