Host Process for Windows Services stopped working and was closed

Hi guys!

Recently had a problem with my hard drive on a dell inspiron 1545 and it was replaced with windows vista being re-installed.
Am now getting the above mentioned error. I think it is linked to the audio driver. I have tried installing the latest driver from the dell website, but no luck.

Problem signature
Problem Event Name: APPCRASH
Application Name: svchost.exe_AudioSrv
Application Version: 6.0.6001.18000
Application Timestamp: 47919291
Fault Module Name: stapo64.dll
Fault Module Version: 1.0.6162.3
Fault Module Timestamp: 49b1572c
Exception Code: c0000005
Exception Offset: 0000000000109314
OS Version: 6.0.6001.2.1.0.768.3
Locale ID: 2057
Additional Information 1: 0a71
Additional Information 2: 2b9e64833ded1b8566df2c12e9bbc072
Additional Information 3: 7f33
Additional Information 4: 792fb17855832c39c432fcfecbbb3da9

Files that help describe the problem
Version.txt
AppCompat.txt
memory.hdmp
minidump.mdmp

thanks vish