You must first update Win7 before trying to install any AMD graphics drivers > Windows Update
The specified item was not found.
getting evertything up-to-date was the problem... I called Acer and explained that the latest driver wasn't working properly. They sent me an email with the original AM D driver (so no update, this one is from 2011) Fifa is working great and I haven't seen any flashing things... I couldn't find the original driver on the AMD site. Maybe I haven't looked good enough. But it seems like the latest driver ánd the bétadrivers are not working proberly (at least on my device).