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Whenever an application wants to make itself accessible over the network, it claims a TCP/IP port, which means that port can’t be used by anything else. So if you need to use an in-use port, how do you tell what application is holding it?

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The Preview app included with Mac OS X is much more powerful than its humble name implies. In addition to simply viewing PDFs, it contains the basic PDF features an average user might need.

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We’re always on the lookout for the simplest and easiest solution to perform a task, preferably while using the least amount of system resources. Here’s how to minimize to the system tray with a tiny little application helper.

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Whether you share your computer with other people or you use it for a lot of downloads, it is nice to be able to clear out the download folder without having to manually take care of it each week or month, which is when an automated deletion comes in handy.

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A decade ago the idea that you’d want to mirror the screen of your mobile phone to your television would seem silly but now that there is so much content on our mobile devices from games to HD video, it’s downright useful to blow up your phone’s tiny display to television size. Read on as we show you how.

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Google Apps Script is a surprisingly powerful scripting language often implemented using Google Sheets. It allows people to develop lightweight web applications, and those scripts run in the cloud on Google’s servers.

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When learning about web servers and how they work, you may be curious if they are constantly listening for requests or if they wait until they receive a request to go into action. With that in mind, today’s SuperUser Q&A post has the answers to satisfy a reader’s curiosity.

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It’s common knowledge that almost every single geek hates Internet Explorer with a passion, but have you ever wondered why? Let’s take a fair look at the history and where it all began… for posterity, if nothing else.

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Have you ever shot a video on your phone that’s too long because of extra filler? Here’s how to trim videos on your Android device using the default video player, so you only share the good parts.

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Google Chrome is extremely popular with our readers, but did you know that they also have a 64-bit version of the browser these days? Here’s how to tell which version you are running, and how to switch if you aren’t.

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Ninite is a free tool that automatically downloads, installs, and updates various Windows programs for you, skipping past the evil toolbar offers. For Windows users, Ninite is arguably the only really safe place to get freeware.

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If you’ve completely forgotten the Wi-Fi password, you can usually just read it from the sticker on the router provided by your ISP — but what if that isn’t the right one? You can also recover your Wi-Fi password from your Mac.

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Without some layer of protection, your kids are exposed to all kinds of risks and dangers online. Even using the basic security features offered on your router, you probably aren’t doing as much as you could, which is where Windows parental controls come into play.

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Search for a duplicate-file-finder and you’ll find yourself bombarded with junkware-filled installers and paid applications. We’ve put together lists of the best free duplicate-file-finders so you can save some time.

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Whether you’re using Linux on your desktop or a server, there are good tools that will scan your system for duplicate files and help you remove them to free up space. Solid graphical and command-line interfaces are both available.

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The built-in Windows firewall is an important part of your system security, but over time, more and more applications end up being allowed through the firewall. Luckily there’s an easy way to reset all the settings to default again.

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