eMachines E525 No Audio in Windows 7 64-bit
Aneka Laptop Dan Driver Laptop
By default Windows installed High definition Audio drivers for this this model in Windows 7. In case there are no sound coming up from your eMachine 525, you need to update the BIOS.
1. Download this BIOS update:
BIOS_eMachines_3.04_A_A.zip (direct from Acer)
2. Extract, and run the exe file to flash the BIOS.