I have WhatsApp on my android and Windows laptop. Late last year I was getting update errors on my old laptop and eventually it stopped working. Deleted and attempted to reinstall, got an error. Loads of fixes on Internet, changes to DNS was mentioned I think, none seemed to work. Solved with purchase of new laptop (already planned!) will shortly be sorting old machine out and passing on to a friend - be interested to see if more or less factory resetting it will allow reinstallation of WhatsApp for Windows.
(For a period last year was also unable to access the American Warbird Information Exchange website in common with other UK users - this eventually resolved itself but Americans had no such problems...)