It is possible that your sound / audio driver is not compatible with the newer version of windows.
Dell optiplex 3020 series intel socket lga 1155 desktop motherboard 40ddp 040ddp. If you have not already, installing the newest bios for your motherboard often helps with a new graphics card. While at the dell download site also update any other drivers that are newer than what you have installed at the moment. Dell motherboard drivers free download - dell wireless drivers, pci ethernet drivers version a01, dell #9 imagine ii win95/nt video drivers, and many more programs.
Motherboard drivers, results 1 - 30 of about 34.
DELL 040DDP MOTHERBOARD DRIVER (dell_040ddp_4317.zip)
