@MikkelDK Yes, I expected more. That is somewhat dissapointing. Yet, now that you have Deco running in Access Point mode, you can do few more tests. Test 1. Turn on Deco Unit 2 Walk to where Deco...

@MikkelDK If you turn WiFi signal off in TP-Link router, the only SSID your devices (laptop, smartphone) should see is the new Deco SSID. In case your devices see old TP-Link router SSID - you...

@MikkelDK You do not need to switch TP-Link router to bridge mode. Login to its Web admin interface, find where WiFi settings are, turn off WiFi network there. You only need to turn WiFi signal off...

@MikkelDK Seems a bit low for 5GHz, and is max speed for 2.4GHz. You are sure you disabled 2.4GHz, right? At least, you have consistent smartphone and laptop speed test at this point, with Main Deco....

@MikkelDK OK, so if I understand it correctly, ISP provided you with the modem and you used TP-Link router attached to it. Now you have removed TP-Link router and connected Main Deco to the modem. In...

@MikkelDK If you haven't given up yet on troubleshooting your laptop, I can offer some suggestions, but I'd rather see it done in more methodical way. As I read this forum conversation, it is not...