The way I used to start applications on Windows 7 is to press the Windows key, type a few letters of the application's name and press Enter. Even if finding the application took a bit longer, Search would defer processing the Enter key until the first results were there, and the desired application would launch.
In Windows 10, the search menu always has a default option to "Search my stuff", which opens an advanced search results window. This option is always there as the first entry before any actual results start showing up, so if I press Enter a fraction of a second before the application I want to launch shows up in the results, I'll go to "Search my stuff" instead. In that window, search takes a lot longer (e.g. finding "Paint" takes about 2 seconds in the Start menu search, but about 10 seconds in Find my stuff), and it doesn't allow selecting results by keyboard, I actually have to move to the mouse to select one.
Is there a way to completely remove the "Find my stuff" entry from the Start menu search results to get rid of this nuisance?