This resets your windows Network Stack entirely, without needing a reboot.
Run 'reset.bat' every time your download stops or hits a very slow speed.
Run 'reset_silent.bat' if you don't want to be bothered with a Y/N option or are automating.
You don't have to reboot your computer, router or modem. Just run the batch, and voila.
If your internet stops working after running this, please run 'undo.bat'.