problems with your laptop and video?

I recently upgraded my girlfriends laptop with 2 GB of RAM instead of 1 GB also installing Vista Service Pack 2, which issued a warning to ensure that the work is not updated with one of the drivers (i did not read it …..) and I also uninstalled Acer Empowering Technology, now the problem is the shit I did to cause the speakers to both static and white noise, this does not happen only with music played regularly at Real Player comes with YouTube, the conduct hard lessons when the sound and video and theres rollercoster tycoon 3, now all the solutions to what the hell, I do because I am dog house and need help please. I like my intestines, where they are. ps. the laptop should be able to take the ram. and is an Acer Aspire 5720 is not only the sound, YouTube will crash with AOL for a bit and the difference to detainees, appears to be video playback with sound

Select Settings> Control Panel / System / Device Manager and delete the sound device and shut down. Reboot and you should get the message "New Hardware Found" view Windows can be installed from the Windows files. If not, you must download and install the driver manually.

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