Windows 7 Problem with sound icon and also running SFC /SCANNOW

Hi, I currently have an issue with my sound icon showing a x on it, its not muted and the drivers are installed correctly, infact i have tried uninstalling the software and letting windows install its own driver which comes up as a hd device audio device, but the icon still have the cross.

if i try and double click the audio icon i get a window straight away telling me that windows is detecting a problem with it but then always shows it doesn't find any problem.

The audio its self actually seems to be working fine, i do have sound and no issues with that side of it.

I have run a SFC /SCANNOW and after it finished it told me it had found corrupt files and was unable to repair them.

Unfortunately i have had to format my laptop a few times recently and really dont want to again as it didn't come with the windows 7 disk, its just a repair from the drive back to factory default, no option to just do a repair and keep your existing files etc which is crap and really puts me off wanting to do it all again.

I have also tried windows fix it's for audio issues and nothing seems to be working for me.

Can anyone please help?

Thanks

James