If you are Talking about the camera app that come with windows 8 try another camera software like this:
Webcam Software - Download Web Camera Programs for your Computer.
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What You Can Do To Solve This Issue is To Simply Just Update Your Driver
Check This Link Out:
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Consider Checking This Link Out As It May Help You With Your Issue
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Faster Boot Time Resolution!
There are many different ways to speed up boot time.
Here is one of them:
1. First Open The "Task Manager"
2. Then Open The Start up tab on the top. If you don't have tabs click "More Details" on the bottom left corner
3. Then Disable All Non wanted...
If It Is Really Buging You Can Just Do A "Clean Install" Of Windows!
You should be able to "Reset" It In Your System Settings Instead Of Having To Illegally or Buy A new one!
Remember to Backup All Important Files!
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I See Your Problem!
One Of Your Problem's May Be That Your Wireless Card or Dongle is not fully compatible with Windows 8.1
The Other Problem is The Location of the two PC'S! If The Windows 8.1 PC is located in the same room i see where your heading!
The Last Problem Could Be A Bad Network...
Like What adamf said Some System's Come With "Pre-Installed" Sound Programs!
That Could Be your problem
If not go down to the task bar and on the left side where the speaker icon is right click then click recording and/or playback devices!
Make sure all of those are set properly!
How To "Uninstall" An Unwanted Program
There are many different ways in which you can fix this
You can go to "Uninstall A Program" Which you can access from the "Control Panel" And find it there!
You Can Find an uninstaller for that specific program in your case...