Inspiron 15 5579 2-in-1 Wifi upload timeouts

Hi,

I bought this at the end of November and things have been going ok until I need to do uploads over my wifi which result in a timeout and loss of internet connection consistently.  My internet is not the problem as I have run multiple speed tests on all my devices and the inspiron is the only one that can't cope with the upload (the test never completes).  I've installed the latest wifi driver and set the settings to maximum performance and not to send the wifi driver to sleep.  None work - looking on the forums others seem to be having this problem as well.  There are a large number of Event 17 WHEA-LOGGER warnings as well (A corrected hardware error has occurred. Component: PCI Express Root Port Error Source: Advanced Error Reporting (PCI Express)) that keep appearing but not in sync with this issue. How do I solve this as this is deeply frustrating as well as rendering my use of the laptop useless.

Thanks