you need to have the 1.4 patch and the language patch in the same folder (I put them in the Witcher folder). then before installing the patch uninstall your anti-virus/firewall ( At least that's what I had to do).
I am having problems with a strange light that keeps appearing in-game and also in cut scenes. And the other one is from the Screen shot it says I have 1.4 but when I click check for updates in the launcher it says I have 1.5