Okay, the network seems fine.
Have you confirmed the download speed with a speed test?
Is it the whole browser that's unresponsive or just a particular tab?
If there is a problem with your machine, going to need to obtain some more information to try and diagnose it. You say you've run several scans, so I'll ignore that angle for now. Although if you haven't already, I'd suggest running a scan with the free version of Malware Byte Anti-virus - which has been the most comprehensive scanner I've used.
I'm wondering if you can collate the following details for me, some of which will need emailing - I'll PM you shortly with my email address:
What version of Chrome are you running? (type these addresses into the address/search bar)
chrome://chrome/
What extensions are you using?
chrome://extensions
What plugins do you have installed?
chrome://plugins
Okay, Chrome generates all sorts of useful telemetry that might give an indication of what is going on.
Visit: chrome://histograms
Save the page as a html file (right click, save as) and email it to me. I'll pm you my email address in a few ...
Please also do:
<windows key> + <r>
msinfo32.exe <enter>
Click "File" -> "Export..."
Save the file somewhere
Email the file to me.
If this doesn't turn up what the problem is, then I suspect it's related to the tabs you have open at the time the problem occurs. In which case, we can look profile Chrome and also look at doing a network traffic capture, whilst Chrome isn't responding.