I have Windows 10 Home v1709 b16299.98, 2012 Dell desktop (i3, 6GB RAM, intel graphics, 64-bit OS), and McAfee LiveSafe. I currently have no problems / errors related to browsers or search engines (or typing speed in these).
None with Edge or Google Chrome browsers. I don't use the IE11 or Cortana. I normally use Edge; and just use Chrome for YouTube (with Adblock for Youtube).
None with Google search engine in Edge or Google search engine in Google Chrome or Bing in Edge. I normally use Bing in Edge.
Not exactly the same computer or software as yours; but possible the same Windows 10. I have no idea if my McAfee LiveSafe Firewall is the same as your McAfee Firewall. My Dell got the free Windows 10 upgrade spring 2016.
I'm no expert, I just have Windows 10 v1709 and McAfee LiveSafe (which has a firewall). Since only 5.3% of Window 10 PCs are on v1709, and about 5.9% (global average) of Surface devices are on v1709 (Surface Pro 1, Surface Pro 2, Surface Pro 3, Surface 3, Surface Pro 4, Surface Book, Surface Laptop, Surface Pro (2017)), I thought I'd write a post. The rest of the Window 10 PCs and Surface devices are on older Windows 10 versions (1703, 1607, 1511, 1507) or on RS4 Insiders. source AdDuplex report Oct 2017.