Hmm...
1. Start > Control Panel > Sounds and Audio Devices
Select the Audio tab.
Under Sound Playback, click on the drop-down list. If there are
more than one devices listed, select the other and try. Click
Apply.
Select the Volume tab. See if you can adjust the volume.
2. You will need to install the graphics card drivers. Windows only
provide the basic drivers needed.
3. Hmm... I see this before, but it's for branded PCs. They have a
hidden partition, which when you click on a file, it will auto
format and install Windows for you. Not too sure how it works for
DIY PCs...