Hello  @BigShock ,

Welcome to our community.

Since this warning appears even without the Archer T4E installed, the adapter itself is not the cause. It's very likely that when you were working inside the case to install the card, you accidentally loosened or partially disconnected one of the PCIe power cables going to your graphics card (GPU). This is a common occurrence when handling components inside a PC.

Here's what to do:
1. Fully power down your PC and unplug it from the wall outlet.
2. Open the case and locate your graphics card. Look for the PCIe power connectors plugged into the GPU — these are typically 6-pin or 8-pin connectors coming from the power supply.
3. Firmly disconnect and reconnect each PCIe power cable to the graphics card, making sure they click securely into place. Even a slightly loose connection can trigger this warning.
4. Also check that the other end of those cables is securely connected to the power supply (if it's a modular PSU).
5. Once everything is firmly seated, close the case, plug the PC back in, and power it on.

This should resolve the warning. If the message persists after confirming that all cables are properly connected, it may indicate a faulty cable or a power supply issue, and you may want to consult a local support for further hardware inspection.