Windows XP Chipmunk audio all programs and Windows sounds

[Legoflamb]

I did some general maintenance on a friend's computer: -

Ran Ccleaner
Removed old out of date antivirus installed new one, updated it, ran it and removed 1 threat
Turned off startup programs
Adjusted appearance for best performance

Didn't do anything major and nothing I wouldn't normally do.

Her computer runs a lot better now but has chipmunk audio problem I'm going to take a look but I'm thinking: -

Drivers
Direct X
Settings in realtek (or equiv.)

Is there anything else I should be looking out for?

 

[Tmagic650]

Are there any yellow exclamation points in the device manager