Sometimes, stuff don’t work as they are meant to. This is one of them. When you plug in your headphones, mic, speakers etc, the motherboard doesn’t detect it because you are using a plane old front jack port (most crappy cabinets have these).  So, its time to go old school. Tell your computer to stop detecting the devices and play the music already. Here’s what you do:

Go to My Computer –> Control Panel –> Realtek HD Sound Manager

Click on Audio I/O Tab –> Settings (The spanner like icon)

Here, check “Disable front panel jack detection”.

That’s it, put in your headphones, speakers into your front panel stereo port and have fun!