Kudos to JIMCO and all his guidance here on this subject.
I inherited an old Dell Inspiron 1515 from my daughter running Vista and upgraded to Win 10.
Everything perfect except for the internal microphone which I managed to recovery using JIMCO´s Sigmatel Vista audio driver R218148 suggestion.
Me too facing the same problem since I've upgraded from xp to windows7 on my inspiron 1525.
I've followed the every suggestion the users gave but that still didn't resolve my problem!
When I am trying to install the above mentioned IDT R261324 (22.214.171.12467, A18) , it asked to me to uninstall the sigma tel audio drivers befrore proceeding to installation! But in my control panel I can nowhere find the Sigma tel drivers, i.e., there are no such kind of drivers installed on my pc!
PLEASE HELP ME TO FIND A SOLUTION FOR THE PROBLEM!
I have same problem , with my microphone for laptop Dell inspiron 1525 because I recently upgraded to windows 7,and I try the link to the IDT R261324 (126.96.36.19967, A18) , but I can not find file IDT R261324 drive , can you please send my the link or file.