Your card is a 7 series and the latest drivers are version 175.19, you can check this against the drivers installed on your machine by right clicking anywhere on the desktop and selecting NVIDIA control Panel from the menu options, when this opens look for a System Information link usually at the lower left had corner and click it, you should see a window with Display and Components tabs, click the Display tab and it should show your graphics card and ForceWare version. If this version is 175.19 the you're up to date if it's 175.16 for instance then older drivers are on your system.
Are you sure you downloaded the drivers correctly? You should have a 61MB exe file with 175.19 and geforce somewhere in the file name. If not try downloading it again and saving it to your desktop for instance.
When installing the drivers firstly uninstall the old ones then unload your antivirus software, note I didn't say uninstall it, there should be some way to temporarily turn it of while you install the new drivers.