No worries!
I'm presuming safe mode boot wouldn't really work?
You could download sysinternals (free ms suite of apps for pro diag stuff), run procexp.exe (process explorer) while the issue is replicated and see everything (and I mean every fuckin thing) running on your machine. I've used it to succeasfully target and physically remove viruses from machines.
Procexp actually can replace task manager in windows.
The next step would be to use and setup Wireshark and start packet sniffing. Not for the weak of heart though. Really Wireshark would require some pro networking expertise to know how to effectively use but its the nitty gritty world of network packet sniffing.
E: sysinternals is here:
https://docs.microsoft.com/en-us/sysinternals/downloads/sysinternals-suite