If it was the updated driver that is causing the problem, you can go to the Device Manager and in the Properties for your sound device you can click on the Driver tab and the select the option to "Rollback Driver" which will revert it back to the old driver.
Computer type PC/Desktop System Manufacturer/Model Number My Own Build OS Windows 7, 64 bit Home SP1, Win 8 Pro 64 bit CPU Intel i7 3770 Motherboard Gigabyte GA-Z77X-UD5H Memory 16GB GSkill Ripsaw F3-14900CL9Q-16GBXL Graphics Card Sapphire HD7770 Sound Card RealTek Monitor(s) Displays Viewsonic VA2448 Series 24" LED Screen Resolution 1920X1080
Keyboard Kensington wired Mouse Logitech Wireless PSU Antec High Current Gamer HCG-620M Modular Case Coolermaster HAF XM Cooling Corsair H80 Liquid cooling with aftermarket Nexus quiet fans Hard Drives 240GB Intel 520 SSD for Win 7
128GB OCZ Vertex 4 SSD for Win 8
1 TB Seagate drive for backup Internet Speed 40 MB/sec (Cable) Antivirus Microsoft Security Essentials and Malwarebytes Browser I.E9/Firefox Other Info Sonar X2 Professional 64 bit Recording Software with Roland Octa-Capture and MAudio Fast Track Ultra 8R recording interfaces, Frontier Tranzport wireless control unit, Behringer BCF2000 Control Surface.
Five USB connected optical drives for CD Audio production using Nero 11
Other systems: Desktop with i5 3550 CPU, LenovoZ560 Laptop with Win 7 64 bit HP, SP1, new iPad
System Manufacturer/Model Number Toshiba Satellite S875D-S7239 laptop OS MS Windows 7 Ultimate SP1 64-bit CPU AMD A10-4600M Motherboard AMD Pumori (Socket FT1) Memory 6.00 GB Dual-Channel DDR3 @ 798MHz (11-11-12-28) Graphics Card AMD Radeon HD 7660G Sound Card High Definition Audio Device Monitor(s) Displays Generic PnP Monitor (1600x900@60Hz) Screen Resolution 1600x900@60Hz
Keyboard Standard PS/2 Keyboard Mouse HP Wireless Optical Mobile Mouse Model FHA-3410 Hard Drives SSD 119GB Corsair CSSD-V128GB2 ATA Device Internet Speed What the local pub, local coffee shop offers. Other Info Optical Drive:MATSHITA BD-CMB UJ160B ATA Device
Also have an Asus ha1002xp netbook with Win 7 Ultimate installed.