I'm encountering a weird problem where my my internet connection speed seems to be throttled down to 20mb/s only when I'm using Windows XP. This occurs when I'm using my Realtek 8811CU WiFi adapter, as well as the onboard Realtek LAN on the mobo. Under Windows 11 this problem is not present, as I'll achieve DL speeds up to 300mb/s, and it also occurs when I'm using a completely different motherboard, and different installation media. I've fiddled with the qos packet scheduler in the group policy editor, and that made no difference either. Does anyone have any ideas?