Wired and wireless mice both plug in the same way — through a USB port on the back or side of your computer

A wired mouse connects directly to your computer with a cable. Plug the USB connector into any open USB port, and your computer recognizes it when ready. No setup needed. If your computer has no USB ports free, use a USB hub — a small device that plugs into one port and gives you four or more.

A wireless mouse uses radio signals instead of a cable. It comes with a small receiver (called a dongle) that plugs into a USB port. The mouse itself runs on batteries. Turn on the mouse, and the receiver finds it automatically within a few seconds. Some wireless mice pair differently — read the instructions that came in the box, because a few models require you to hold a button on the mouse and receiver at the same time.

Either way, your computer should recognize the mouse within seconds. Move it around to test. If nothing happens, try a different USB port — some ports on older computers work better than others.

Key Takeaways

  • Wired mice plug directly into a USB port and work when ready with no setup.
  • Wireless mice need a USB receiver plugged in, and the mouse itself runs on AA or AAA batteries.
  • If your computer has no free USB ports, a USB hub lets you add more without removing anything else.
  • Most mice work on any computer with USB ports — Windows, Mac, or Linux — without installing software.
  • If the mouse does not move after plugging in, try a different USB port on your computer.

Where to find USB ports on your computer

Desktop computers usually have USB ports on the back of the tower and sometimes on the front. Look for small rectangular openings about the size of a postage stamp. The back ports are more reliable. Laptop USB ports are on the sides — left, right, or both.

If you cannot find an open port, unplug something you use less often — a printer, external drive, or keyboard — to free up space. Or buy a USB hub at any electronics store for ten to twenty dollars. Plug the hub into one port, and you get four or more ports from that single connection.

What to do if the mouse does not work after plugging in

First, make sure the mouse is turned on. Wireless mice have a power switch on the bottom — flip it to the on position. Wired mice do not have a switch; they work as soon as they are plugged in.

Second, try a different USB port. Some ports on older computers do not work well. Move the receiver or cable to another port and wait five seconds.

Third, check that the batteries in a wireless mouse are not dead. Open the battery compartment on the bottom, remove the batteries, and replace them with fresh ones. If you have no spare batteries, borrow some from a remote control to test.

If the mouse still does not work, the device itself may be broken. Try the mouse on a different computer if you have access to one. If it works there, the problem is with your computer's USB ports or drivers — contact the computer maker or a local repair shop.

Connecting a Bluetooth mouse without a receiver

Some wireless mice use Bluetooth instead of a USB receiver. These mice pair directly with your computer without a dongle. On Windows, go to Settings, then Devices, then Bluetooth and other devices. Turn on Bluetooth, then turn on the mouse and hold its pairing button for three seconds. The mouse appears in the list — click it to connect.

On a Mac, go to System Preferences, then Bluetooth. Turn on the mouse and hold its pairing button. Click the mouse name when it appears.

Bluetooth mice are convenient because they use no USB port, but they drain batteries faster than wired mice and slightly faster than USB wireless mice. Keep spare batteries on hand.

Choosing between wired and wireless

Wired mice never need batteries and cost less — usually five to fifteen dollars. They work when ready and never disconnect. The cable can get in the way if your desk is crowded, and you cannot move the mouse far from the computer.

Wireless mice let you move freely and look cleaner on a desk with no cables. They cost more — fifteen to fifty dollars depending on the brand — and you have to replace batteries every few months. Some people find the slight delay between moving the mouse and seeing the cursor on screen noticeable, though most modern wireless mice are fast enough that you will not notice.

For everyday use at a desk, either works fine. If you move your mouse around a lot or sit far from your computer, wireless is worth the extra cost. If you want the cheapest option and do not mind a cable, wired is the better choice.

Cleaning and maintaining your mouse

Wired and wireless mice both collect dust and skin oils. Once a month, wipe the bottom and sides with a dry cloth. If the cursor moves jerkily, the sensor on the bottom may be dirty — clean it gently with a slightly damp cloth and let it dry completely before using.

For a wireless mouse, check the battery compartment every few months. If you see corrosion (white or blue powder) around the battery contacts, wipe it away with a dry cloth and replace the batteries. Corrosion means the batteries have leaked and the contacts need cleaning.

Keep the mouse away from extreme heat, cold, and moisture. Do not leave it in a car in summer or a damp basement. These conditions shorten battery life and can damage the electronics inside.

Frequently Asked Questions

Can I use a mouse from an old computer on a new one?

Yes, as long as it has a USB connector. Mice are not tied to specific computers or operating systems. A mouse that worked on a ten-year-old Windows computer will work on a new Mac or Linux machine. Plug it in and move the cursor to test.

What if my mouse has a ball on the bottom instead of a smooth sensor?

That is an old mechanical mouse. It still works, but the ball collects dirt and the cursor becomes jerky. Remove the ball by twisting the ring around it counterclockwise, then wipe the ball and the rollers inside with a dry cloth. These mice are reliable but slower than modern ones — consider replacing it if the cursor skips or sticks.

Do I need to install software or drivers for a mouse to work?

No. Standard mice work when ready on Windows, Mac, and Linux without any software. Some gaming mice or mice with extra buttons come with software that lets you reprogram those buttons, but that is optional. The mouse will move the cursor and click without it.

Can I use more than one mouse at the same time?

Yes. Plug in or pair a second mouse, and your computer recognizes both. Both cursors appear on screen, and you can use either one. This is useful if two people share a computer or if you want a trackpad and a mouse at the same time.

Why does my wireless mouse keep disconnecting?

The batteries are probably low. Replace them with fresh ones and the problem usually stops. If it continues, move the receiver closer to the mouse — thick walls or metal objects between them can weaken the signal. If the mouse still disconnects, try a different USB port for the receiver, or move it away from other wireless devices like routers or cordless phones.