Whitson Gordon — Anyone running a Windows computer knows how important it is to have good anti-virus software. If someone you know still doesn't have anti-virus software running, here's a quick guide you can send them to help them set it up.

The video above should walk you through most of the process, but you can read through the steps below as well. We're going to use Microsoft Security Essentials for this demo, since it's very easy to use and does a great job of protecting you from viruses. There's really no need to spend money on anti-virus software when Microsoft's offerings are more than good enough.

Windows 7: Use the middle-click button on your mouse and the taskbar to open a new window for an application or quickly close a window. Here's how.

To open a new window for an application, middle-click on its icon in the taskbar. For example, middle-clicking on the Chrome icon will open a new browser window.

To close a window, middle-click on its Aero Peek thumbnail. This could be useful when you have multiple windows open, since you can quickly close a bunch of them by middle-clicking.

[via MakeUseOf]

Adam Dachis — The apps you have "running" on your iDevice may actually be eating up a little battery life after all. While Apple claims that their solution to multitasking—which is suspending apps rather than having them truly run in the background—is better for battery life. While that may be the case, it seems that having a bunch of apps in the multitasking queue may actually hurt your battery life a little bit after all.

According to David Pogue, in his column for the New York Times, keeping a bunch of apps suspended in your multitasking queue is actually sucking up you device's battery life:

Move over Mac Defender—there's a new malware variant in town, and it doesn't require the administrator password for installation. Security research firm Intego issued a new warning to Mac users on Wednesday, heavily cautioning users that a new variant on Mac Defender, called Mac Guard, is making the rounds via SEO poisoning online.

Intego initially warned users about a fake antivirus program called MAC Defender (it has since gone through several name and capitalization changes) earlier this month. The Mac-like app posed as an antivirus program and asked users for their credit card numbers in order to purge viruses on their machines or protect them from new ones. Although Intego initially gave Mac Defender a low risk rating because of its admin password requirement, it soon became apparent that Mac Defender was indeed beginning to make the rounds among the Mac-using community. We spoke with a number of third-party support reps, as well as several Apple Store Geniuses, who vouched for an apparent increase in Mac Defender malware reports.