The 8188GU is USB 2.0. Plugging it into a USB 3.0 port works, but use a (6 inches or more) to move the dongle away from USB 3.0 electromagnetic interference. USB 3.0 ports leak noise in the 2.4 GHz band, killing throughput.
Unplug the adapter and insert it into a different USB slot. Avoid using external, unpowered USB hubs. Plug it directly into the motherboard ports on the back of a desktop tower. Issue 2: Frequent Network Disconnections realtek 8188gu wireless lan 80211n usb nic driver
A driver is the software component that allows your operating system (like Windows 10 or 11) to communicate with the hardware (the USB adapter). Without the correct Realtek 8188GU driver, you might experience: The adapter not being recognized at all. Slow internet speeds. Frequent disconnection from Wi-Fi. "Yellow exclamation mark" in Device Manager. Download Realtek 8188GU Wireless LAN 802.11n USB NIC Driver The 8188GU is USB 2
: While official Linux support is often limited, community-driven drivers are available on platforms like GitHub for distributions such as Ubuntu and Armbian. Common Challenges: "CD-ROM Mode" Unplug the adapter and insert it into a different USB slot