Uninstall and reinstall the Sound card driver.
Visit the website of the sound card manufacturer to download and install the latest driver.
if you at safe mode audio service and driver is disable
http://windows.microsoft.com/en-us/windows/which-drivers-loaded-safe-mode#1TC=windows-7
Devices and drivers that start in safe mode-
Floppy disk drives (internal and USB)
-
Internal CD-ROM drives (ATA, SCSI)
-
External CD-ROM drives (USB)
-
Internal DVD-ROM drives (ATA, SCSI)
-
External DVD-ROM drives (USB)
-
Internal hard disk drives (ATA, SATA, SCSI)
-
External hard disk drives (USB)
-
Keyboards (USB, PS/2, serial)
-
Mice (USB, PS/2, serial)
-
VGA display cards (PCI, AGP)
- Edited by britishdhez 2 hours 48 minutes ago
if you at safe mode audio service and driver is disable
http://windows.microsoft.com/en-us/windows/which-drivers-loaded-safe-mode#1TC=windows-7
Devices and drivers that start in safe mode-
Floppy disk drives (internal and USB)
-
Internal CD-ROM drives (ATA, SCSI)
-
External CD-ROM drives (USB)
-
Internal DVD-ROM drives (ATA, SCSI)
-
External DVD-ROM drives (USB)
-
Internal hard disk drives (ATA, SATA, SCSI)
-
External hard disk drives (USB)
-
Keyboards (USB, PS/2, serial)
-
Mice (USB, PS/2, serial)
-
VGA display cards (PCI, AGP)
- Edited by britishdhez Monday, May 25, 2015 4:36 AM
if you at safe mode audio service and driver is disable
http://windows.microsoft.com/en-us/windows/which-drivers-loaded-safe-mode#1TC=windows-7
Devices and drivers that start in safe mode-
Floppy disk drives (internal and USB)
-
Internal CD-ROM drives (ATA, SCSI)
-
External CD-ROM drives (USB)
-
Internal DVD-ROM drives (ATA, SCSI)
-
External DVD-ROM drives (USB)
-
Internal hard disk drives (ATA, SATA, SCSI)
-
External hard disk drives (USB)
-
Keyboards (USB, PS/2, serial)
-
Mice (USB, PS/2, serial)
-
VGA display cards (PCI, AGP)
- Edited by britishdhez Monday, May 25, 2015 4:36 AM
Hi,
Try following the instructions as mentioned in the link below (not safe mode)
No sound in Windows
Regards,
D. Wu