Faced the very same problem, which drove me crazy..!!!The SOLUTION is to replace the Intel® Killer™ Wireless-AC 1550 with the Intel® Killer™ Wi-Fi 6 AX1650.I'll send screenshots when I'll be on that laptop.Have a second one (Alien-15 R3) writing now.So buy a new Network Card (20$ maximum).
I  have been dealing for a long time and and tried multiple solutions from YouTube and forums. The 17 R5 warranty expired August 2019. The problem is that I'm able to connect to websites like this one in any browser,  but when I try to connect websites like YouTube,  Facebook, Netflix,  etc. It's impossible, the computer acts as if I don't have internet. I already checked the hardware and software of the computer, have multiple visits of internet provider tech guys but they told me that it was something related to SmartByte and I already tried solutions related to that but none seems to work. I'm almost crazy because I don't know what else to do?
17 R5, not connecting to some internet websites and apps