It’s important to remember to show your keyboard some love every now and then both for the sake of good hygiene and to ensure it functions properly. Those keys take quite a beating everyday, and all the little crevices are excellent at trapping things like dust and hair, and if you ever eat near your computer, it’s easy to wind up with sticky surfaces and crumbs buried between the cracks. Ew, right? Here, step-by-step instructions to get your keyboard in tip top shape.

Shut down your PC, and unplug the mouse, discs or CDs, USB drives or anything else that’s protruding from your machine. Carefully, turn the keyboard (or your entire laptop, as the case may be) upside down and give it a gentle shake to release any dusty build-up that might be lurking between the keys.

Use a can of compressed air (available at just about any electronics store) to blow off residual debris around and under all the nooks and crannies. Alternatively, the hose of a vacuum cleaner works too.

Put a couple drops of isopropyl alcohol on a Q-tip and run it around the edges of your keys to get them squeaky clean. The cotton swab should be only slightly damp—not wet—dripping liquid into your keyboard is (obviously) a bad thing!

Lastly, give the whole thing a once over with a dry, lint-free cloth, and let it air dry for a few minutes before using it (never turn on your machine until you’re positive the keys are completely dry). And between in-depth cleanings, one of my favorite tricks is to use the sticky part of a Post-It note to run between rows of keys to pick up dust.

Source: http://shine.yahoo.com/event/haven/how-to-clean-your-keyboard-1117544/

We have all heard the term Trojan Horse, but what exactly is it? A Trojan Horse is a destructive program that masquerades as a harmless application. Unlike viruses, Trojan Horses do not replicate themselves, but they can be just as destructive. One of the most dangerous examples of a Trojan is a program that promises to rid your computer of viruses but instead introduces viruses into your computer.

The Trojan can be tricky. Who hasn’t been online and had an advertisement pop up claiming to be able to rid your computer of some nasty virus? Or, even more frightening, you receive an email that claims to be alerting you to a new virus that can threaten your computer. The sender promises to quickly eradicate, or protect, your computer from viruses if you simply download their “free”, attached software into your computer. You may be skeptical but the software looks legitimate and the company sounds reputable. You proceed to take them up on their offer and download the software. In doing so, you have just potentially exposed yourself to a massive headache and your computer to a laundry list of ailments.

When a Trojan is activated, numerous things can happen. Some Trojans are more annoying than malicious. Some of the less annoying Trojans may choose to change your desktop settings or add silly desktop icons. The more serious Trojans can erase or overwrite data on your computer, corrupt files, spread other malware such as viruses, spy on the user of a computer and secretly report data like browsing habits to other people, log keystrokes to steal information such as passwords and credit card numbers, phish for bank account details (which can be used for criminal activities), and even install a backdoor into your computer system so that they can come and go as they please.

To increase your odds of not encountering a Trojan, follow these guidelines.

1. Remain diligent
Trojans can infect your computer through rogue websites, instant messaging, and emails with attachments. Do not download anything into your computer unless you are 100 percent sure of its sender or source.

2. Ensure that your operating system is always up-to-date. If you are running a Microsoft Windows operating system, this is essential.

3. Install reliable anti-virus software. It is also important that you download any updates frequently to catch all new Trojan Horses, viruses, and worms. Be sure that the anti-virus program that you choose can also scan e-mails and files downloaded through the internet.

4. Consider installing a firewall. A firewall is a system that prevents unauthorized use and access to your computer. A firewall is not going to eliminate your computer virus problems, but when used in conjunction with regular operating system updates and reliable anti-virus software, it can provide additional security and protection for your computer.

Nothing can guarantee the security of your computer 100 percent. However, you can continue to improve your computer's security and decrease the possibility of infection by consistently following these guidelines.

Botnets are networks of computers that hackers have infected and grouped together under their control to propagate viruses, send illegal spam, and carry out attacks that cause web sites to crash.

What makes botnets exceedingly bad is the difficulty in tracing them back to their creators as well as the ever-increasing use of them in extortion schemes. How are they used in extortion schemes? Imagine someone sending you messages to either pay up or see your web site crash. This scenario is starting to replay itself over and over again.

Botnets can consist of thousands of compromised machines. With such a large network, botnets can use Distributed denial-of-service (DDoS) as a method to cause mayhem and chaos. For example a small botnet with only 500 bots can bring corporate web sites to there knees by using the combined bandwidth of all the computers to overwhelm corporate systems and thereby cause the web site to appear offline.

One well-known technique to combat botnets is a honeypot. Honeypots help discover how attackers infiltrate systems. A Honeypot is essentially a set of resources that one intends to be compromised in order to study how the hackers break the system. Unpatched Windows 2000 or XP machines make great honeypots given the ease with which one can take over such systems.

A great topic to read up on this is The Honeynet Project which describes its own site's objective as "To learn the tools, tactics and motives involved in computer and network attacks, and share the lessons learned.

A consumer spending slump dealt a blow to electronics makers in 2009. With industry sales expected to tumble 8% to $164.9 billion this year, Pioneer dropped out of the plasma HD television market and mobile Internet device innovator OQO shut its doors. Even the supposedly recession-proof video-game industry suffered steep sales declines.

But the year in tech wasn't all bad. Online retailer Amazon (AMZN) kicked off a frenzy of competition with its wireless Kindle e-Book readers. A certain operating system named Droid emerged to give Apple a run for its money in the smartphone market. And eco-friendly products, from big-screen televisions to music systems, became commonplace.

Read on for the best products for 2009, as selected by BusinessWeek's technology writers and editors, as well as five highly anticipated products that failed to meet expectations.

Best Gadgets of 2009

1. Kindle 2 International Edition

Amazon
$259

When it was released last year, Amazon's Kindle quickly outshone the previously released Sony e-book reader, thanks to the inclusion of free, high-speed wireless access that lets users download books on the go. The retailer's superb follow-up this year offered a much-improved design and wireless connectivity that lets users download books outside the U.S. for a fee. But Amazon (AMZN) will have to keep innovating to stay ahead in a market that's quickly getting crowded with devices from rivals, including Barnes & Noble (BKS).

2. Windows 7

Microsoft
$49.99 (Windows 7 Home Premium)

Windows 7 fixes many of the problems that plagued Vista, the preceding version of Windows. Available on most new PCs, Win 7 boots faster than Vista and performs snappily, with more intuitive features than ever before.


3. Samsung 8500 Series LED Television

Samsung
$3,700

Never content to be a follower, Samsung rocked competitors with a new line of superthin high-definition televisions that use energy-sipping light-emitting diodes as their primary light source instead of traditional cold cathode fluorescent lamps. The top-of-the-line 8500 Series measures just 1.6-inches thick and processes pictures at a faster rate than older sets to reduce motion blur and create video-like images. The LED sets also include Internet connections that let users download content off the Web. Rivals Vizio, LG, and Sony are hot on Samsung's heels with their own LED-based sets and are throwing in software that the high-end Samsung set lacks, such as those that connects to Yahoo! (YHOO) tools or allows Netflix (NFLX) streaming movie access.


4. IdeaPad S12 Netbook

Lenovo
$599

Many electronics users have had a love-hate relationship with netbooks since their introduction. With their cramped keyboards, low-power processors, and small 7-in. screens, they're highly portable but not good for much more than surfing the Web. Lenovo addresses these shortcomings with the IdeaPad S12. It has a 12.1-in. screen sporting a high-definition 1280-by-800 resolution display. The IdeaPad is one of the first netbooks to sport Nvidia's (NVDA) high-end Ion graphics chip to support HD streaming video without the stuttering playback that's plagued other netbooks. Excellent stereo speakers, a relatively speedy Intel (INTC) Atom processor, and a six-hour battery make the S12 a shoo-in for our favorite netbook of the year.


5. Dual-View TL220 Digital Camera

Samsung
$250

Some products make so much sense they leave you wondering why nobody thought of them before. Samsung's Dual-View TL220 digital camera fits that description. Say you want to snap a picture of yourself and the family but don't have the time to set up a tripod or will to bother a passerby. Simply tap the front of the 12.2-megapixel TL220 to engage a 1.5-inch view screen that lets you frame yourself in the picture quickly and easily. There's even a child mode that displays built-in animations to keep the kid occupied while you line up a shot. With a wide-angle lens and the ability to shoot short HD movies, the Samsung Dual-View sets a new standard for point-and-shoot cameras.


Worst Gadgets of 2009

1. Aspire EasyStore H340 NAS Server

Acer
$390

We loved the idea: a low-priced machine that lets you store up to 500,000 digital photos, 300,000 MP3 files, and 4,285 hours of movies, and then send and share the information with devices in the home and on the road. The Aspire is slick, has a powerful Intel Atom processor, and is relatively easy to set up and install. The desktop software is the deal breaker; it includes McAfee (MFE) antivirus software that can't be removed and at times significantly slows your PC's operations. Also, if you lose the installation disc, there's no way to download it from Acer's Web site.


2. Windows Mobile 6.5 Operating System

Microsoft
Free (with purchase of Windows Mobile smartphones)

Microsoft has been working hard to put its Windows Mobile operating system on par with Android, Palm's webOS, and the software running Apple's iPhone. But Windows Mobile 6.5 doesn't quite get there. Sure, it's zippy and more stable than previous generations, but the touchscreen interface needs work, and the overall experience seems Stone Age compared to its rivals.


3. Twitter Peek

Twitter Peek
$200 (with wireless lifetime service)

With Twitter available on so many smartphones, you'd better make a dedicated mobile Twitter device good. This isn't. Its shortcomings are legion. It doesn't display full 140-character messages on the home screen, and there's no way to include multiple Twitter accounts or even get Tweets from one account if you power the device off and turn it back on.


4. PoGo Instant Digital Camera

Polaroid
$180

We liked the idea of a digital camera that can instantly print out images on the run. But overall, the camera was too heavy to carry around for extended periods of time, its tiny prints yielded washed-out or uneven colors, and the tradeoff between novelty and value was too high at a time when a point-and-shoot digital camera at twice the resolution can be had for $40 to $70 less.


5. AT&T 3G Network

AT&T
www.wireless.att.com

We hate to kick them when so many others have come before us. But spotty 3G coverage and overloaded networks have hobbled Apple's iPhone and App Store in some big cities and kept us from adding the iPhone 3GS to the list of this year's best gadgets. A delay in offering multimedia text messaging (while still charging for it) also merits a bucket of coal.

Source: http://finance.yahoo.com/family-home/article/108279/best-and-worst-tech-gadgets-of-2009