Windows 7: How do I enable front panel audio ?

System Manufacturer/Model Number Assembled
OS Windows 7 Ultimate 64-bit SP1
CPU AMD Athlon II X2 260 @ 3.2 Ghz
Motherboard Gigabyte Technology Co., Ltd. M68MT-S2 (Socket M2)
Memory Kingston 8.0GB Dual-Channel DDR3 @ 669MHz (9-9-9-24)
Graphics Card ASUS EAH 5450 - 1 GB
Sound Card Realtek HD Audio
Monitor(s) Displays 23 Inch - DELL SP2309W
Screen Resolution 2048 x 1152

Keyboard Logitech
Mouse Logitech
PSU 450W
Case Iball - Standard Form - i8190
Cooling Stock Cooling
Hard Drives 488GB Seagate ST3500418AS ATA Device (SATA)
Internet Speed 1 MB/Sec
Other Info Creative Inspire 2.1 Speakers, LITEON 24x DVD Writer

Computer type PC/Desktop
System Manufacturer/Model Number Dwarf Dwf/11/2012
OS Windows 7 Ultimate x64 Service Pack 1
CPU Intel Core-i5-3570K 4-core @ 3.4GHz (Ivy Bridge) (OC 4.2GHz)
Motherboard ASRock Z77 Extreme4-M
Memory 4 x 4GB DDR3-1600 Corsair Vengeance CMZ8GX3M2A1600C9B (16GB)
Graphics Card 2 x AMD Radeon HD7770 1GB CrossFired (OC 1100MHz/1250MHz)
Sound Card Realtek High Definition on board solution (ALC 898)
Monitor(s) Displays ViewSonic VA1912w Widescreen (VGA)
Screen Resolution 1440x900

Keyboard Microsoft Comfort Curve Keyboard 3000 (USB)
Mouse Microsoft Comfort Mouse 3000 for Business (USB)
PSU XFX Pro Series 850W Semi-Modular
Case Gigabyte IF233
Cooling 1 x 120mm Front Inlet 1 x 120mm Rear Exhaust
Hard Drives OCZ Agility 3 SSD 120GB SATA III x2 (RAID 0) Samsung HD501LJ 500GB SATA II x2 Hitachi HDS721010CLA332 1TB SATA II Iomega 1.5TB Ext USB 2.0 WD 2.0TB Ext USB 3.0
Internet Speed NetGear DG834Gv3 ADSL Modem/Router (Ethernet) ~4.0 Mb/s (O2)
Antivirus Avast! 8.0.1483
Browser IE 9
Other Info Optical Drive: HL-DT-ST BD-RE BH10LS30 SATA Bluray Lexmark S305 Printer/Scanner/Copier (USB) CTF-430 Tablet & Pen WEI Score: 7.7/7.9/7.4/7.4/7.9 Asus Eee PC 1011PX Netbook (Windows 7 x86 Starter)

System Manufacturer/Model Number Assembled
OS Windows 7 Ultimate 64-bit SP1
CPU AMD Athlon II X2 260 @ 3.2 Ghz
Motherboard Gigabyte Technology Co., Ltd. M68MT-S2 (Socket M2)
Memory Kingston 8.0GB Dual-Channel DDR3 @ 669MHz (9-9-9-24)
Graphics Card ASUS EAH 5450 - 1 GB
Sound Card Realtek HD Audio
Monitor(s) Displays 23 Inch - DELL SP2309W
Screen Resolution 2048 x 1152

Keyboard Logitech
Mouse Logitech
PSU 450W
Case Iball - Standard Form - i8190
Cooling Stock Cooling
Hard Drives 488GB Seagate ST3500418AS ATA Device (SATA)
Internet Speed 1 MB/Sec
Other Info Creative Inspire 2.1 Speakers, LITEON 24x DVD Writer

Computer type PC/Desktop
System Manufacturer/Model Number Dwarf Dwf/11/2012
OS Windows 7 Ultimate x64 Service Pack 1
CPU Intel Core-i5-3570K 4-core @ 3.4GHz (Ivy Bridge) (OC 4.2GHz)
Motherboard ASRock Z77 Extreme4-M
Memory 4 x 4GB DDR3-1600 Corsair Vengeance CMZ8GX3M2A1600C9B (16GB)
Graphics Card 2 x AMD Radeon HD7770 1GB CrossFired (OC 1100MHz/1250MHz)
Sound Card Realtek High Definition on board solution (ALC 898)
Monitor(s) Displays ViewSonic VA1912w Widescreen (VGA)
Screen Resolution 1440x900

Keyboard Microsoft Comfort Curve Keyboard 3000 (USB)
Mouse Microsoft Comfort Mouse 3000 for Business (USB)
PSU XFX Pro Series 850W Semi-Modular
Case Gigabyte IF233
Cooling 1 x 120mm Front Inlet 1 x 120mm Rear Exhaust
Hard Drives OCZ Agility 3 SSD 120GB SATA III x2 (RAID 0) Samsung HD501LJ 500GB SATA II x2 Hitachi HDS721010CLA332 1TB SATA II Iomega 1.5TB Ext USB 2.0 WD 2.0TB Ext USB 3.0
Internet Speed NetGear DG834Gv3 ADSL Modem/Router (Ethernet) ~4.0 Mb/s (O2)
Antivirus Avast! 8.0.1483
Browser IE 9
Other Info Optical Drive: HL-DT-ST BD-RE BH10LS30 SATA Bluray Lexmark S305 Printer/Scanner/Copier (USB) CTF-430 Tablet & Pen WEI Score: 7.7/7.9/7.4/7.4/7.9 Asus Eee PC 1011PX Netbook (Windows 7 x86 Starter)