Dell Optiplex 745 audio driver issue.

[Klasher1000]

Hey everyone, I just recently tried to upgrade my old Optiplex 745 to Windows 7 (it was running xp before). It has a decent amount of ram (5 gb) and runs pretty smoothly except for one thing... The integrated audio doesn't work. I've tried downloading the Vista and XP drivers and running them in compatibility mode to no avail. I keep getting an error message of "The audio driver files do not support your computer hardware. Note: If you uninstalled audio software without restarting your PC, restart now, then run this setup again."
I've tried this many times, and I am getting quite irate. If anyone knows what is wrong and how to fix this please respond asap.

 

[cin19]

You can borrow the OptiPlex 780 audio driver for win7, because they share the same "Analog Devices ADI 198x Integrated HD Audio" or you can use the vista driver too, because they are compatible win7.
Optiplex 745 http://downloads.dell.com/Pages/Drivers/optiplex-745.html
OptiPlex 780 http://ftp.dell.com/Pages/Drivers/optiplex-780.html