You most likely have no drivers or corrupted drivers installed for your sound card. You need to visit the Samsung UK support page that I've linked for you here: http://www.samsung.com/uk/support/detail/supportPrdDetail.do?menu=SP01&prd_ia_cd=1402&prd_mdl_cd=NP-R60F002/SUK&prd_mdl_name=NP-R60&srchword=NP-R60F002/SUK
1. Click on Driver
2. Scroll down and look for the drivers that match your operating system. If you Windows 7, then choose a Windows Vista driver.
3. Click on the Zip
icon on the far right in the Sound (Audio)
row to download the driver.
4. Open up the downloaded Zip file and extract to a folder on the desktop.
5. Open up the extracted folder and double click Setup
to begin driver installation.
6. Wait for driver and software to install and then restart
computer if prompted.
Good luck, please post back to this solution if you have any difficulties, and thanks for using FixYa.