I have a aspire 5810TG laptopt and recently installed windows 7 on it but sadnly enough the drivers from ati wont work and yes i did switch graphics card from intel to ati but still no luck
it used to be easy to do this but now it says " your card is not compatible " eventough i used automatic downloader and i did manally
the card is a radeon hd 4xxxx but i cant install this driver and it is very frustrating.
The only driver which is OLD that works is hte one from aspires on website and its from 2009 . there is no new driver updates on their site
Generally you must rely on the laptop's manufacturer to update the video card driver because many times the driver are specifically tweaked for the laptop. AMD's driver are generic and would work on laptops that don't use tweaked drivers specific to the laptop.
Since you have an old integrated graphic chip Acer is unlikely to release an update.
In the event you decide to replace your laptop sometime in the future, you need to be aware of laptop with switchable graphics. Those are laptops with both integrated graphics (in the CPU itself) and a dedicated video card. AMD's generic driver are absolutely not compatible, you must use the ones provided by the laptop manufacturer.