Hi, my name is Claudeir. I'm an Independent Advisor and a Microsoft user like you.
Unfortunately there is no safe way to do this, because if Microsoft ''facilitated'' this type of action, piracy would be very big, I hope you understand.
I believe there is no reason for you to ''blame'' Microsoft, I know this can be frustrating and I understand you, however, technology advances every day, laptops and cell phones will become obsolete over time, and the same happens with internet speed, unfortunately 1MB of speed is not enough for today.
I would suggest to you to limit your bandwidth during the download, not to consume all your internet, however 1 MB is very little, if limited it will take a long time, maybe even 1 month to finish your download, not to mention for the rest of things trying to use the internet will be very slow.
The most sensible suggestion in your case would be to purchase an internet plan with a higher download speed.
If the answer helped in any way, please consider leaving your opinion, marking it as answered or leaving more details so that we can continue the service, this is very important to us.
Sincerely,
Claudeir