A super fast copy + paste - I would ahve wrote it up myself but it was much simpler to search and paste.
Increase volume on weak laptop speakers w/ Windows 7
You can boost the sound by 200%
1. Right click on "speak icon" on the right corner of the display
2. Click "Playback devices"
3. Under Playback Tab, click "Speaker -HD Audio Device" and then click "Properties"
4.Under Enhancements Tab, check on "Loudness Equalization", then click OK
The only con is there is more distortion at max volume. At 50-75% volume works fine
This option works great for headphones and external speakers too.