Hi, my name is Dave Andrews. Today, I'm going to show you how to check and repair a system files in Microsoft Windows Vista. Let's go to our desktop, and we're going to run a com, a command that comes with Windows Vista. If you'll click on your start button, and in the little search area right here we're just going to type cmd, as in command, and for the command prompt right click on it, and say run as administrator. You have to execute this program we're going to execute as an administrator. Just click continue on the security window that pops up. Now, what we're going to do is run a system file checker. What that's going to do is that's going to scan through all of the Windows Vista system files, and it's going to make sure that none of them have become corrupted or have been somehow replaced with a malicious file that could be causing us problems. So, and they will also res, it will also restore those files. So, we want to run the system file checker, and the command is sfc for system file checker followed by a space and the forward leaning slash, scan now, all one word, so it's sfc, space, slash, scannow. Just press enter, and as you can see our system file checker is beginning a scan. It's going to take a little bit of time, and it's going to scan through all of Windows Vista system files, make sure they're in tact, and make sure that they're valid. My name's Dave Andrews, and I've just showed you how to check and repair system files on Windows Vista.