Mouse stutters with other USB devices
Why does my wired mouse stutter when other USB devices are plugged in?
Written by The CommonFixes team · fact checked by CommonFixes review desk
Last updated
Short answer
Several USB sockets on a laptop usually share one internal controller and one pool of bandwidth. A webcam streaming video or a drive copying files can take most of that pool, and a high polling rate mouse asking for a position a thousand times a second gets pushed to the back of the queue. Cheap unpowered hubs make it worse, and a USB 2.0 device plugged into a USB 3 port can also throw off wireless receivers sitting next to it. The quickest thing to try first: move the mouse to a socket on the other side of the laptop — Ports on opposite edges are usually wired to different controllers, so simply swapping sides often clears it in seconds. Keep the mouse and any wireless receiver away from the port the webcam or external drive is using. Most people are done in about 15 minutes.
Full walkthrough below: 6 steps for Windows, rated easy.
Sounds like this
- •The pointer skips as soon as a webcam, headset or external drive is connected
- •It gets worse while a file is copying to a USB drive
- •Unplugging one device makes the mouse smooth again
Why it happens
Several USB sockets on a laptop usually share one internal controller and one pool of bandwidth. A webcam streaming video or a drive copying files can take most of that pool, and a high polling rate mouse asking for a position a thousand times a second gets pushed to the back of the queue. Cheap unpowered hubs make it worse, and a USB 2.0 device plugged into a USB 3 port can also throw off wireless receivers sitting next to it.
Work through these in order
0% done- 1
Move the mouse to a socket on the other side of the laptop
Ports on opposite edges are usually wired to different controllers, so simply swapping sides often clears it in seconds. Keep the mouse and any wireless receiver away from the port the webcam or external drive is using.
- 2
Take the hub out of the equation
Plug the mouse straight into the laptop rather than through a hub, dock or monitor. If you need the hub, buy one with its own power adapter. Unpowered hubs split a single port's power and bandwidth between everything hanging off them, and the mouse is always the one that suffers.
- 3
Lower the polling rate
Open your mouse software, for example Logitech G Hub or Razer Synapse, and set the report rate to 500 Hz or 250 Hz instead of 1000 Hz. You will not notice the difference in normal use, and it cuts the traffic the mouse puts on the shared controller by half or more.
- 4
Stop Windows switching the port off
Right click Start, open Device Manager, expand Universal Serial Bus controllers. For each USB Root Hub, right click, Properties, Power Management tab, and untick Allow the computer to turn off this device to save power. Do the same under Human Interface Devices for the USB Input Device entries. Power saving on a shared hub is a very common cause of a stuttering pointer.
- 5
Check for a driver fighting for the same resources
Download LatencyMon, let it run for two minutes while you move the mouse and copy a file. If it names a driver such as a network or storage driver as the highest interrupt time, update that driver from the laptop maker's support page. This turns a vague stutter into a named cause.
- 6
Use the laptop maker's chipset driver
Go to the support page for your exact model and install the current chipset and USB driver package. Windows installs a generic USB driver that often handles shared bandwidth badly on newer machines, and the proper one usually settles it.
If none of that worked
If the stutter only appears while a webcam is running, set the camera to 720p rather than 1080p in the app you use for calls; that alone frees up a large slice of the shared bandwidth. For a desktop, a cheap PCIe USB card gives the mouse a controller of its own.
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The CommonFixes team
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This guide was last updated on 10 August 2026. If a step no longer matches what you see on screen, tell us on the contact page and we will test it again.
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