I found the correct driver for you. I didn't realize you were from egypt. They didn't have an egyptian driver, but the closest I found was the "middle east" drivers. The next closest was south african drivers. Here is the link: http://global-download.acer.com/GDFi...e&Step3=Aspire
Make sure you select your correct operating system (Windows ultimate 32bit). It will be listed as VGA and Nvidia. Uninstall any other driver you've installed for the Nvidia card and only use this one.
If you have problems with that driver let me know. It is hard to find region-specific drivers for Egypt. You only needed that one driver, right?