Did you go into Device Manager and do what Latency Checker thinks it may be? In any case it is usually the Wi-Fi, but you also have something I think called Wi-Max. You disable those in the Device Manager and go back and check your computer. (that is after reading a review about your computer searched for on the Internet). If you need or they have device drivers for your hardware to upgrade to, you do that also.
I am not sure about the USB:
"I have two Generic Usb Hub entries,
two of these: Intel(R) 5 Series/3400 Series Chipset Family USB Enhanced Host Controller - 3B34 and two USB Root Hub entries."
I always heard Intel 7 and above (up to 9 back a couple of years now perhaps) for USB controllers, but I am not sure about that. If the computer is only 3 years old, I would think that those may be okay, but then you might want to search on the Internet and see what is said about them.
Turn off the Wi-fi and Wi-Max (disable) when not using them and do not try audio with those on probably is perhaps the main problem.
Although if it is the USB hubs not good, you may just need a better newer computer.
?? I do not know for sure, but I am sure all of it can be found by searching on the Internet.
I have a desktop computer and it never gets beyond what your lowest reading are or around that.
But Wi-fi is not connected on my computer or on either.