Slow performance when downloading

[QwerkyPengwen]

--EDIT/UPDATE--
I found the problem. I am using BitTorrent to download Unigine benchmarks and some other stuff (not illegal stuff just that torrenting the stuff I need like Unigine is faster with torrent)
Turns out that for some odd reason this program has issues from time to time in Windows 10 and I fixed it by changing compatibility mode to Windows XP and setting Run as Administrator.

--Original Post--
Not sure if this is a software issue or a hardware issue so I'm posting it here for now.
First off my specs.
i7-6700K OC @4.7Ghz
16GB (2x8) RAM @2400Mhz
Samsung 840 EVO 250GB SSD
Seagate Barracuda 1.5TB 7200RPM HDD
Windows 10 Pro x64

My problem is that starting today my system seems to get laggy when downloading stuff. According to task manager I'm not using a ton of CPU, RAM or Disk when downloading.
CPU is sitting around 20% usage
RAM is 20-25% and disk usage is barely breaking 2%

This never happened before today.

Any Idea what might be going on?

I've tried doing a restart of the PC with no luck there.
According to what I see with task manager everything checks out but for some reason my system is slow when downloading

My SSD storage is below 50% full and I'm not reading/writing anything to the HDD when downloading.

 

[mazboy]

If you're connected to the internet via wifi, try connecting by ethernet and see if that makes a difference.

 

[QwerkyPengwen]

If you're connected to the internet via wifi, try connecting by ethernet and see if that makes a difference.

Updated my post. I figured it out. Thanks.