Im having one hell of a time myself with the internet.
I have had a huge issue with Vodafone and after a million phone calls and an eventual threat from my solicitors, its now finally all sorted, but the internet is still disgusting under Windows 10.
I am lucky in that I have a load of PCs that I use for some reason of another and right now, I am piddling abotu on a Windows 7 64 bit system, that is accessing the internet at a great speed and when I go to the Windows 10 PC... Poor again.
There is no hardware issues in my internet / network of any description and so the issue can only possibly be with that PC.
I have run Live Linux distros on it and its fine there and so its Windows 10.
In all honesty, I am now bored of people saying how good it is when in fact it is not good at all, its just a load of cack and I absolutely adore Windows 7 and so Im going back to 7 when I get fed up on the main PC... I still have its Windows 7 licence.
Although to be fair Windows 8.1 was fine.