Make a folder on your desktop, name it audio driver. Extract the driver file to that folder on your desktop. when extraction is complete go into the folder and find install.exe file and click it.
It appears from what you are saying that you do not have a program that will unzip zipped files. You could get winrar or winzip and install one to unzip files, you also have a built in that you can use by right clicking on the file and choosing extract to (whatever location you choose).