A USB peripheral that cannot maintain a steady connection is essentially useless. By Ben Stegner, Oct. 19, 2026, 11:45 a.m. EST
USB is supposed to be straightforward: plug a device in and the computer communicates with it until you choose to eject it. In practice, many users experience frequent disconnections, which can cripple a mouse, cause a keyboard to miss keystrokes, interrupt video from a camera, or stop file transfers to an external drive. When this happens, a systematic check of the device, cable, port, and computer is required. Often the fix is simple, but starting with the easiest step—restarting the computer—can clear a temporary glitch before deeper troubleshooting begins.
**Isolate the problem**
Begin by testing the USB device in a different port and, conversely, testing another USB device in the original port. If the first accessory fails in every port, the issue likely lies with the device or the computer. If multiple accessories only misbehave in one specific port, that port is probably at fault.
Examine the connector on the device for looseness, bent pins, or other damage. Inspect the cable for frayed jackets, sharp bends, or visible wear. Replace any removable cable that shows signs of damage, as faulty cables are a common cause of intermittent connections.
Look into the port with a light source; debris or dust can prevent a solid connection. Gently dislodge particles with a wooden toothpick—never use metal tools. For stubborn debris, short bursts of canned air can clean the port safely. If the internal pins appear warped, professional repair may be necessary unless you are comfortable with hardware work.
If you are using a USB hub, try connecting the device directly to the computer. Hubs add another point of failure, especially unpowered models that must supply power to high‑draw devices. When a hub is needed, choose a powered version that plugs into a wall outlet. On desktop PCs, prefer the rear ports for permanent connections; they are wired directly to the motherboard and usually have less latency than front‑panel ports, which rely on extension cables.
**Check Windows power and driver settings**
Windows can power down USB ports to save energy, which sometimes leads to unexpected disconnections. To modify these settings, right‑click the Start button or press Win + X, then select Device Manager. Expand the Universal Serial Bus controllers section. For each entry, double‑click, go to the Power Management tab, and clear the box labeled “Allow the computer to turn off this device to save power.” Click OK to apply.
Next, type “power plan” into the Start menu and open the Choose a power plan link. Click Change plan settings next to the active plan, then select Change advanced power settings. In the dialog that appears, expand USB settings, then USB selective suspend setting, and set the option to Disabled. This prevents Windows from suspending USB ports, though Microsoft recommends keeping selective suspend enabled for power efficiency.
Outdated or corrupted USB drivers can also cause problems. In Device Manager, open the Driver tab for each USB entry and click Update Driver; the tool may not find a newer version, but it is worth checking. If a particular port is problematic, you can select Uninstall Device for that entry, then restart the computer so Windows reinstalls the driver automatically. Identifying which Device Manager entry corresponds to a specific port can be tricky; plug and unplug a device while watching the list, or use the free USBDeview utility for clearer insight. Avoid disabling the port that supplies power to your keyboard or mouse, or you may lose control of the system.
**Additional device‑side considerations**
While many issues stem from the computer, the peripheral itself can be at fault. A mouse, external hard drive, or other device that has been dropped or exposed to moisture may have internal damage. Also verify that the port you are using supports the intended function. Not all USB‑C ports handle video output, and on some laptops only one of several USB‑C connectors supports charging. Consult the product specifications if the ports are unlabeled.
Use the correct cable for the task. Some cables are designed solely for charging and do not carry data. If a phone cannot transfer files to a PC, try a different cable that is rated for data transmission.
USB ports appear on many devices beyond PCs, including routers, cars, and televisions. The troubleshooting steps outlined above generally apply to those devices as well. When dealing with non‑computer hardware, refer to the user manual or online support resources to confirm the intended use of each port.