You can find the VGA driver for the Aspire M3-481 below. You will note that this is a Windows 8.1 driver. There are other drivers for the laptop on this website including the Aspire M3-481 card reader and Aspire M3-481 drivers. Look at the other pages for these drivers. The VGA driver is from Intel and is version 10.18.10.3304 which was released in 2013. Always check your hardware before you install the driver.
The Intel driver which you can download below for the Aspire M3-481 is linked to the Acer website. You are best advised to simply click on the link and wait a second or two for the driver to start the download. Its a large 154MB file so ensure that you have the correct hardware.
Aspire M3-481 VGA Driver