Your double-click settings might need adjusting.
Press the
Press
Click on the
Make the
Use the nearby lightbulb picture to test whether the mouse is clicking properly. Clicking it once should make the bulb glow dimly; double-clicking should make it glow brightly.
If your mouse double-clicks when you want it to single click, you may need to adjust the double-click setting.
If the problem remains even though you have increased the double-click timeout, your mouse may be faulty. Try plugging a different mouse into your computer and see if that works properly. Alternatively, plug your mouse into a different computer and see if it still has the same problem.