For the sound problem, make sure you've installed the drivers for the device.
For the second problem where your @ and " keys are swapped, you're not alone...! It happens alot...
...to fix this, go to Start > Control Panel > Regional and Lanuguage Options > Make sure that English (United Kingdom) is selected in the Regional Options tab > Then click on the Languages tag > Click the Details... button > When the Text services and input languages window appears, ensure that English (United Kingdom) - United Kingdom is chosen as the Default input language > Under installed services, click add. Once the Add input language window appears, select the input language English (United Kingdom), check the Keyboard Layout/IME checkbox, then in the dropdown menu select United Kingdom Extended > Then Apply and ok all windows.
|Desktop PC| |Macbook Air 13" (Mid 2013)|
|Windows 8.1 Pro (x64)| |AMD FX 4100 Black Edition 3.6 GHz @ 4.0 GHz OC| |Arctic Cooling Freezer 13 PRO| |Gigabyte Nvidia GeForce GTX 560 Super Overclock 1GB| |ASUS M5A78L-M/USB3 Motherboard| |Samsung 840 Pro 256GB SSD SATA III HDD| |Kingston HyperX 8GB PC3-14900 DDR3-1866| |OCZ ModXStream Pro 700W Modular PSU| |NZXT Vulcan Micro ATX Case|