Download speed is a function of your modem, not your computer. Use https://www.speedtest.net/ or similar site to see what your speeds are. My upload is 945 and download 180.

I see 'Broadband internet access is defined as a minimum of 25 Mbps download and 3 Mpbs upload speeds. This is the lowest recommendation for use with Intuit Hosting."  is the required speed.

Reset your modem and try again. (unplug, wait 30 seconds and plug in again is one method)

Alternatively look for other internet options. Some cell service companies are offering internet e.g. https://www.google.com/search?q=internet+service+for+remote+areas