My PC info is:
Model: HP EliteBook 8540p
System type: 64-bit Operating System
Windows 7 Professional
Problem: I was watching a movie a night before, and I muted and forgot to turn off my laptop, today I found out the sound did not work, so I tried restarting and still no hope, i tried disabling and enabling the IDT High Definition Audio CODEC and still no hope, windows says that this device is working properly, but oviously its not I really need help, I dont know anything advanced about technology yet, so im helpless.