Hi imtheluckyone, and welcome to the HP Forums! :smileyhappy:
I understand that you are experiencing an issue with your sound volume on your HP Pavilion dv7-1245 Notebook. I will try my best to help you with this issue.
Here is a document for Resolving No Sound or Audio Problems (Windows Vista) with steps that may resolve your issue.
I also suggest Testing for Hardware Failures (Windows 7, Vista) to rule out a hardware problem. :smileywink:
I hope this information is useful, please let me know how it goes.
Thank you and have a great day!