I also tried installing a codec a97 from realtek site and windows says it can't verify and starts and endless loop.
Also if I open my Device manager I see 2 devices that are not installed and that win 7 doesn't have drivers for it:
PCI\VEN_1180&DEV_0592&SUBSYS_14E71043&REV_12
and
PCI\VEN_1180&DEV_0843&SUBSYS_14E71043&REV_12
Is it linked to my problem?
Can you help me pls?