DavidPK, Thank you so much!!!!! I followed all the steps (which were simple to understand btw) and the sound works perfect now!
There was still one little issue, that came up after the sound started working, when I right-clicked on the speaker icon, a message popped up and said the microphone realtek driver recent enhancements have caused issues with it. So I clicked yes to remove some of the enhancements for the microphone driver. And the mic started working again. So everything is working perfectly now.
I really appreiciate your quick response. I feel so relieved now. Thanks again!!
Best Wishes,
Tiara