GWX is Get Windows 10 and I was wondering if it was triggered to go looking for the update at certain times.
You can also check to see if Bullguard is also tasked to perform certain actions at given intervals or any of MBAM.
An intermittent fault is the worst type to try to nail down.
The Paging File is your Virtual Memory and you can check to see that it is set for Windows to auto manage it but with 8GB RAM installed you probably wouldn't need it.
http://windows.microsoft.com/en-gb/windows/change-virtual-memory-size#1TC=windows-7However, I noticed from your Task Manager/Performance that you have very little free memory left.
While I may only have up to 10 tabs open but generally a lot less, below is my Task Manager/Performance and I also have 8GB RAM installed.
I also have IObit Uninstaller and the free version of MBAM - but not Exploit, but don't have them running in the background and have disabled MBAM in services.msc
When you are talking about "slow" is this primarily browsing ?
This can occur when the SNRM drops which affects your bandwidth and could be an explanation for it being intermittent if your computer still performs normally with multiple tabs open at other times.
Would you say that the slow occurs at peak times or isn't there any pattern to it ?
At these times you could run a speed test from
www.speedtest.net to see if you are getting what you normally or should be getting when all is well.
You would need to log into your router to check the SNR Margin at these times and if the Downstream is well under 1 then first have a look around your home to see if anything is coming on that could interfere with your broadband signal and checking to see if you still get the slow or not when Ethernet wired could point to fluctuating broadband.
Depending upon your answer, I'll go into more detail on improving your wireless signal.