My system: Acer Aspire V3-771G, i7, 16Gb RAM, 128Gb SSD, 750Gb HD, 17,3' FullHd etc. If you have made the Acer App/Driver Backup DVD by the eRecovery Management on Windows 8. Before downgrading you should be able to install the USB drivers installing the Intel Chipset drivers.

Why do i see many drivers? Below is a list of drivers that may be suitable for your device. With the different devices, they can have the same driver, it's because they all use the same chip manufacturer. How to select driver? If you are looking for an update, pickup the latest one. If your driver isn't working, use the driver having the same OEM with the your laptop/desktop brand name.