Once the update process starts, it works automatically. It may be required to shut down the PC and restart again (you may get a request to do so, it can’t hurt to do so).

> Where is the driver located?

Hmmm. I am not sure what you mean because the I don’t see how a literal answer would help you. But OK: Windows device drivers are simply one or more files with executable code typically stored in locations like C:\Windows\system32\drivers. Even advanced users normally don’t need to go to such directories, and Windows tends to mildly hide such directories to protect them.

What you may may and what might be helpful: how can I see that the driver needs to be updated or whether the update was successful?
Go to the Windows 7 Device Manager (using e.g. the procedure in http://en.wikipedia.org/wiki/Device_Manager#Windows_7) and find the device for “sound”. Once you get to the actual driver (instead of a folder-like thingie) right click on it and select Properties. This gives information about version numbers and even the actual file names (which I insisted you didn’t need to know). The version number should change when Windows Update replaces a driver by a newer version. Searching on the driver’s description on Google should lead to a lot of information in case you need to do things in some super-manual way.

Note that I no longer have access to the system described in the posting. So I probably can’t be of further help.

Peter

That typically happens in a matter of days, but you can manually trigger Windows Update to check for updates (via Control Panel, System or via webbrowser and http://www.windowsupdate.com).

Hope this helps, Peter