Fujitsu-Siemens LIFEBOOK AH550 Notebook Realtek ALC269 Audio Driver 6.0.1.5911 (Intel GFX)

  It is highly recommended to always use the most recent driver version available.

Try to set a system restore point before installing a device driver. This will help if you installed an incorrect or mismatched driver. Problems can arise when your hardware device is too old or not supported any longer.