Hello and welcome to PCHF Bennyboy.
I have encountered this problem before and it was due to a file that was running in my task manager which was being run by my video editing software.
- Try to open your task manager and close any programs that you don't require, if you are unsure then post a screenshot and we will be able to tell you.
- Can you try updating your sound card drivers
- Do you have any video editing software installed on your pc?