Cant get sound to work after installing FL studio

Cant get sound to work after installing FL studio

Ok so I bought and installed FL studio. Now my sound doesnt work for Youtube or any video games or movies. Like i can hear backround music but no voices. Or if i do hear voices they are really low.

I have a PC run windows 7

Things i have tried:
Uninstalling FL studio
Reinstalling flash
Updating drivers
Changing settings in mixer.
Changinging volume control.
Going to a system restore point.
Going back to default settings

I really need help with this as I have a project due for a class in a week and it uses ableton/ fl studio

have you tried buying a mac? but in all honesty I have no idea, wish I could help but when I was running FL studio on my old lappy I had no problems.

Is it maybe the sample rates set to different values for your sound card?