ti lascio altri link che puoi provare..se il driver gusta al Sig. Vista64 si installa se no non funziona:

questo č quello ufficiale DELL x Vista64
ftp://ftp.us.dell.com/audio/R171788.exe

Install

1.Double-click the new icon on the desktop labeled R171788.exe.
2.The Self-Extracting window appears and prompts you to extract or
unzip to C:\DELL\DRIVERS\R171788. Write down this path so the executable (I.e.
Setup.exe) file can be found later.
3.The Self-Extractor window appears.
4.Click OK.
5.After completing the file extraction, if the Self-Extractor
window is still open, close it.
6.Click the Start button and then click Run.
7.Type C:\DELL\DRIVERS\R171788 in the Open textbox and then click OK.
8.Follow the on-screen installation instructions.




questi 2 invece sono sempre della DELL ma meno aggiornati

http://ftp.us.dell.com/audio/R160062.EXE

http://www.dell-drivers.com/Download...io/R153910.EXE



alla disperata si puā sempre tentare con quelli di XP 64Bit
http://www.dell-drivers.com/Download...io/R171789.exe