Sound not working on laptop

Question

hi there,
I use two external screen with my laptop. an LG I bought in America at home, and a AOC I bought in Scotland at the office.
my sound works fine at home on the LG, however occasionall on the AOC I cannot hear any sound unless I use headphones. 
if I attempt to test the sound on my laptop I get the following message "The device is being used by another application. Please close any devices that are playing audio to this device and try again".
I do not have any other devices runnig on my laptop that I know of. I have been on several internet forums and tried several make shift solution none of which have worked perminently.
any help is appreciated!

Answer 1

Hello heAdstroMan,
Welcome to the HP Forums!
I understand your sound is intermittently working on one of your monitors. There has been a large amount of success with uninstalling a certain Windows Update that has been known to cause audio issues. Try this fix previously posted by @SuperMario1 :
Uninstalling the Windows Update, then hiding it, is the only method of eliminating the issue if it caused by this update. Here is the procedure for uninstalling the update:
Step1:
1. Go into Control Panel, then click on “Programs and Features”.
2. Click on “View Installed Updates”. Look for the update with the ID number KB2962407.
3. Right-click on the update and select “Uninstall”. Restart the computer.
Step 2: Next, here is the procedure for hiding the update:
1. Go into Control Panel, then click on “Windows Updates”.
2. Click on “Check for Updates”. When the process is completed, is should find important update(s) available. Clicking on the message will open a window where the important update(s) is.
3. Right-click on the KB2962407 update and select “Hide Update”. This will prevent the update from being installed next time Windows Updates are being installed.
Let me know if this works for you.
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