I've added the bg-slate-900 background color to both the html and body elements in the layout file. This ensures that any white space or margins at the top of the page will now match the dark slate background of the application, eliminating the white line you were seeing.

I've updated step 3 to specifically instruct users to select the x64 architecture option first when browsing known builds. This ensures they choose the correct 64-bit version which is standard for modern PCs, and I've also added a helpful tip explaining that x64 is the standard architecture.