No sound - Windows 7 upgrade Dell 1420

Have a Dell Insprion 1420 - recently upgraded from Windows Vista to Windows 7 professionally - have sound through earphones not speakers. Can you help?

Install this for 32 bit:

http://support.dell.com/support/down...eckFormat=true

Update the bios if necessary.

Thanks tried that when I try to save it says "session is corrupt -download again".

You need to contact DELL because I get page not found 404 error no matter how I try to get that file. Even other driver sites link back to that page on Dell so they fail as well.

http://expwinproblems.blogspot.com/2...a-windows.html

I think this is the same file:

http://www.mediafire.com/?mglhinymzzq