@martiejk 

Try the new ProSeries Tool Hub
https://proconnect.intuit.com/community/help-articles/help/fix-common-problems-and-errors-with-the-p... 

AND USE IT TO INSTALL 2019. As stated, you can also look at the pretty picture posted by @Just-Lisa-Now-  as an alternate method. 

Please understand that this is NOT SUPPORT. This is a community of other users trying to help other users. If we fail you, then actually contact support. https://proconnect.intuit.com/support/en-us/help-article/intuit-product-orders/contact-proseries-hel...