Have you reported the detection of your sounddriver as a false positive to avast!
The name and path of the driver might also help us to pin down the problem.
thanks for your reply ,no i haven`t reported it .these are all the paths i have added to the behavioural shield and sandbox exclusions ,but it seems to be the behavioural shield that blocks the soundcard . the sound card splash screen appears but then gets stuck for 5 mins when loading fx presets.
C:\Program Files\Creative Professional\E-MU PatchMix DSP\EmuPMixDSP.exe
C:\Documents and Settings\All Users\Start Menu\Programs\Creative Professional
C:\Program Files\Steinberg\VstPlugins
C:\Documents and Settings\All Users\Start Menu\Programs\Creative Professional\E-muPatchMix DSP
C:\windows\system32\drivers\ctaud2k.sys
It is the latest driver which came out in 2008.