Step
	On the desktop, right-click My Computer, and then click Properties.

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Many legitimate advertisers on the Internet use windows that pop up in the middle of your screen to display a message. They might also open when you click a link or button on a Web site, and they might open either over or under the window you wish to view. Some pop-ups are helpful. For example, if you click an image to see a larger version, it might open in a pop-up window. Unfortunately, some pop-up windows can contain inappropriate content or can be a way for you to accidentally download dangerous software (called spyware or adware) onto your computer.

With Windows XP Service Pack 2 (SP2) Internet Explorer allows you to prevent most pop-up windows from appearing over pages you want to view while you’re using the Internet.

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netsh is a wide-ranging command-line diagnostic tool that has an exceedingly large number of commands available. The most useful of the netsh commands are the netsh diag commands. Use them to find out information about your PC’s network setup, such as finding the IP address of its mail server, newsgroup server, DNS server, and similar resources.

There are two ways to use netsh: directly from the command line with all its switches, or first getting to the netsh console by typing netsh at the command line and then typing the command from the netsh> prompt that appears. For example, you could type netsh diag show adapter at the command line, which lists every network adapter on your PC, or you could get to the netsh> prompt and type diag show adapter.

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When you try accessing a secure website sometime you get this warning message.

There is a problem with this website’s security certificate. The security certificate presented by this website was not issued by a trusted certificate authority.

Security certificate problems may indicate an attempt to fool you or intercept data you send to the server.
We recommend that you close this webpage and do not continue to this Web site.

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