Windows 10: My Internet speed ethernet is only reaching up to 32 kbps

I have tried everything on the internet, but nothing seems to work. But strangely when i do one of them internet tests online it suddenly gives it a boost by about 500mbps but only lasts about 5 seconds. I don't really know what to do. It has been fine for a while, but it has just suddenly stopped working.

:)

 

slow internet speed through ethernet(high speed internet connection), and disk usage as high as 100 percent

i have an ethernet connection for using internet. i have 2 windows 10 , version 1607 laptops. When i plug the ethernet cable in one laptop, i can use internet at the speed promised by my service provider(2mbps). I have checked this speed in task manager.

but when i plug in the same ethernet cable in other laptop, internet speed in task manager shows very little speed near about 50 kbps. and this too doesnt remain constant. the speed varies very rapidly between 0-100 kbps. suppose first i saw 20kbps, then
in next second it goes as high as 100 kbps..and then in the next second it shows 0kbps..remains 0kbps for a few seconds, and then again speed picks up for a few seconds.

One more key observation, whenever internet speed grows, my disk usage grows as high as 100 percent. And then internet speed slows down.

Whenever i connect this laptop(the one i am using ) to internet either through ethernet/wifi...even with higher speed connection, though i get a bit higher speed, but i have observed a lot of fluctuations in speed in task-manager, performance tab, the graph
rarely stays straight(constant), it just forms a triangular shape, it as if a connection loss is taking place every 4-5 seconds.

A month ago, this PC was working well.

 

Why is my internet speed dropping suddenly to kbps?

My internet speed suddenly drops to few kbps. The only thing that fixes it is to toggle the airplane mode off and on again.

 

Internet speed issues

My download speed never exceeds 75 kbps but as in the image the task manager in ethernet section it shows 512 kbps or above most of the time

And in uttorent it never excceed 70 kbps but for a second or 2 it goes upto 100 kbps or above but still at the same moment speed decreases to 70 kbps at the same moment