Hi Ann,
Thank you for reaching out to the Microsoft Community!
Based on the description, it appears that you want to install 2.4G Wireless Mouse on the Acer Aspire Laptop.
1. Which version of Windows is installed on the computer?
2. Do you have any issues in installing the mouse?
I will be glad to assist you with this.
Let’s try these steps and check if it helps.
a. Insert new batteries into the battery compartment of your wireless mouse.
b. Position the wireless receiver least eight inches away from your laptop, and between eight inches and six feet away from the mouse.
c. Insert the driver CD for your wireless mouse into your CD drive.
d. Follow the on-screen instructions to install the mouse driver.
e. Connect the wireless receiver to the USB port on your laptop.
f. Test your new mouse by moving it around on your screen and clicking a few icons.
If you have further questions on Windows, please do not hesitate to let us know. It is our pleasure to be of assistance.