Delay before Windows 10 startup app launches

I launch an AutoHotkey script (.ahk) when Windows 10 boots, but it takes 10-20 seconds from when I'm logged in until the script starts. The strange thing is that the overall system is very snappy, so I can search and launch applications manually as soon as I'm logged in. Manually searching for and launching Chrome for instance, takes less than a second.

So the problem doesn't seem to be a hardware bottleneck; it looks like a software delay in Windows 10. Could it be that one of the other startup applications takes a long time to launch? "NVIDIA Backend" is one of the other two applications that launch on startup, could that be causing this strange delay? I used to run Windows 7 until a month back, and never once saw this issue.

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