Sorry, I missed getting back on this one.
If it's a.ZIP file, or any other similar file such as .RAR, it needs to be unzipped. If you don't have a ZIP utitlity you could get 7-Zip. It's a free download and it's the one I use myself. Just google 7-zip. Open it and navigate to the compressed file in the 7-zip window, select the file by clicking on it then clcik on the 'Extract' button - a thick blie line - on the toolbar. It will ask you where you want it to extract the contents to. Yoou can create a new folder just for this or choose 'Here' if your drivers file is already in a separate folder.
Once it is extracted you should find the driver is an .EXE file which will then run, or if it a large driver package there may be a 'setup.exe' file to run instead.