Welcome to TSF. :wave:
Look in Device manager (To open Device manager: Click Start >> Run >> Type devmgmt.msc and click OK).
Click View >> Show hidden devices.
Any yellow or red "marks" in device manager?
Also - make sure the audio has been started by Windows:
Click Start > Run > type services.msc - then click OK.
In the new window - Scroll down to "Windows Audio", right-click on it and select Properties.
Another new window - set the startup type to Automatic, click Apply and then click Start.
What motherboard do you have?
Have a look at this: http://www.techsupportforum.com/f242/sound-problems-try-these-things-first-222432.html
Look in Device manager (To open Device manager: Click Start >> Run >> Type devmgmt.msc and click OK).
Click View >> Show hidden devices.
Any yellow or red "marks" in device manager?
Also - make sure the audio has been started by Windows:
Click Start > Run > type services.msc - then click OK.
In the new window - Scroll down to "Windows Audio", right-click on it and select Properties.
Another new window - set the startup type to Automatic, click Apply and then click Start.
What motherboard do you have?
Have a look at this: http://www.techsupportforum.com/f242/sound-problems-try-these-things-first-222432.html