The eMachines 3260 is a UK model. I don't see driver download support at the UK site.
However the eMachines 3260 uses an Intel D845GVSR motherboard. Let's go to Intel Support, and see if the graphics, and audio drivers are available;
On this page select the Operating System you are using. I am going to use Windows XP, as an example. (Home Edition or Pro Edition, doesn't matter)
Shows 7 drivers.
Among them are;
1) Intel Extreme Graphics Driver for 845 Chipset-Based Intel Desktop Boards
2) Audio: Realtek* AC97 Audio Driver
Download AND install these two drivers.
Post back in a Comment.