A number of iPhone and iPad users have fallen foul of a particularly nasty hack, in which they find themselves locked out of their devices unless they pay to have them unlocked.

The extortionist leaves a message claiming to be from the well-known software engineer Oleg Pliss. A message on the screen reads "Device hacked by Oleg Pliss", and encourages the user to pay $100.

Holding a device for ransom is a scary practice. Hackers seize control, and then ask the owner to pay a fee to unlock it. If the victim does not comply with their demand, there is little that can be done to regain access to private data, which may include sensitive information like bank account passwords, photos, work documents and so on. Some people cave in, paying the hackers. Others refuse and end up losing everything on their device.

Some Australian Apple users are reporting they are dealing with a hacker (or group of hackers) that goes by the name Oleg Pliss, that holds their iOS and Mac devices for ransom, demanding a certain fee (initial reports say $100) to relinquish control. Affected Apple devices have been locked through Find My iPhone, a tool that lets users track their enrolled iOS and Mac devices, basically rendering them useless.

While I am mostly a Windows and Linux user, I also run a Hackintosh. I do this for a couple of reasons -- partly curiosity, but mostly I just want to be knowledgeable about all operating systems. So, periodically I will boot into my OS X SSD and play around. Today, I decided to check for updates and received the below scary message. At first I thought I was hacked or compromised. After some Googling however, it seems I am not alone and it is not limited to Hackintoshes. The problem is on Apple's end and is an enormous fail.

"An Error has occurred.The certificate for this server is invalid. You might be connecting to a server that is pretending to be 'swscan.apple.com' which could put your confidential information at risk". My confidential information at risk? Oh my!

I learned about the change yesterday, unhappily. File this story under "read the fineprint department". Since Apple introduced its extended warranty plan, I have praised the benefits and plucked down the extra $99 for every new iOS device. AppleCare+ extends standard repair coverage to two years and offers fairly affordable replacement -- up to two times. Somehow I missed that Apple raised replacement price to $79 from $49 for iPhone.

The saga started around the midday meal. My daughter expressed amazement how last week her iPhone 5s popped out of her jeans and fell from a third-story balcony. No damage. Twenty-minutes later, while we sorted clothes for the thrift store in the garage, she fumbled the device, which fell face flat onto the cement -- shattering the screen. No words can describe either of our reactions. The irony was so thick my eyeglasses fogged.

Twentieth in a series. Missed out on Weed Firm? Don't worry, Apple may have pulled that particular game from the App Store, but there are plenty of smoking new apps available to devote your time to.

New releases this week include an app that offers a fun way to find your missing iOS device, an HD remake of a Nintendo DS classic, a picture sharing app with a twist (you add songs to your shots), a construction game for kids, an app to help you catalog your favorite wines, a swarm-based game, and a GPS app for golfers.

Google has passed Apple in the brand stakes for the first time with technology dominating the world’s top ten most valuable brands including a strong 12 months for Microsoft.

Research from Millward Brown shows that Google’s brand value grew by 40 percent from 2013 to 2014 as it moved from second to first place with a valuation of $159 billion ahead of its competitor Apple, which saw its value drop 20 percent to $148 billion.

Weed Firm is one of those games, like Flappy Bird before it, that took the App Store by storm, reaching the number one spot purely through word of mouth. The trouble for Apple is the game follows the "vicious and lawless career of Mr. Ted Growing", an expelled botany sophomore, and is essentially a marijuana growing sim in which you produce and sell different types of weed, and interact with various shady characters including cops, gangsters, druggies and dancers. Not exactly the sort of game Apple really wants to see at the top of its charts.

It was perhaps a surprise that the Breaking Bad inspired app made it through Apple’s rigorous, and at times prudish approvals process in the first place, but having flourished far too well at the top, it was only a matter of time before it was hacked down. The game, inevitably, is no longer available in the App Store.

The features of the new Microsoft Surface Pro 3 are impressive even when they are assessed individually. But they are even more impressive when grouped together in one single device, which might just be the first one of its kind that is actually the real deal -- it works as a tablet, it works as an ultrabook and it is good enough to replace both. At least that is what Microsoft is saying.

During the presentation event Microsoft made it clear the Surface Pro 3 is meant to compete with Apple's mighty 13.3-inch MacBook Air, more so than with the iPad. Make no mistake, this device is not a tablet in the traditional sense of the word. It is akin to a hybrid PC, much like the Surface Pro 2, due to its size, processor architecture and target market. So, because Microsoft made a big deal out of it being better than its ultrabook rival, how does it compare with the bigger MacBook Air?

Since the mobile universe was first split into the great hulking behemoths of iOS and Android, smartphone users have been asking "How can I run Apple apps on my Android device?"

Well, this could be the answer you're looking for. A team of US computer scientists has announced the development and successful testing of software that allows Android and Apple apps to run side-by-side on the same devices.

My three sons share an Apple iPad given to them by Mimi, their grandmother. When she bought it a couple years ago the iPad was top-of-the-line with 64 gigs and a Retina display. The boys run it hard on car trips where it functions as a hotspot and under covers in their bedrooms along with a couple iPhones, iPod Touches, various Kindles and some cheaper seven-inch Android tablets.

In all we have probably a dozen touchscreen devices in the house but most of the action takes place on iPhones or that one iPad. Great for Apple, right? Not really. Apple’s iPad sales are dropping you see and the reason nobody seems to talk about is they don’t wear out.

Tablets have forever changed the landscape of computing. An entire industry has been formed from Apple's tablet alone -- iPad cases. Yes, cases for the tablet are very abundant from many manufacturers. A search on Amazon, results in a smorgasbord of options, such as color, size and price.

Unfortunately, the market is so flooded that it is nearly impossible to impress with a new case. Surprisingly, a company called Acme Made has done just that with the Ergo Book. It is an extremely svelte case, for which the manufacturer is seeking funding from Kickstarter. Will you back it?

While Apple and Google are fighting a FUD war for the hearts and minds of K-12 campuses, there's one area of education that neither has been able to penetrate with success: higher ed. Specifically, I'm referring to the conglomerate of colleges and universities across the US (and likely abroad).

That's because for all their love in the media, tablets have yet to prove their weight when it comes to deep research and content manipulation in the classroom. Real student work comes in the form of content creation, not consumption -- an area Google and Apple are endlessly infatuated with.

Nineteenth in a series. iTunes was updated to version 11.2 this week. As my colleague Brian Fagioli reports, it's not the most exciting release with most changes relating to improvements to podcasts. It also fixes an annoying issue whereby iTunes could become unresponsive when updating Genius.

New and updated releases this week include an iOS port of classic indie PC game Thomas Was Alone, the official app of the National September 11 Memorial & Museum, a social network app that wants to be like a party, an arcade shooter, and a new app from FourSquare. RockMyRun has been updated too, and can now automatically adjust the speed of the music you're listening to so it matches how fast (or slow) you're running. There's a great travel app featured this week too.

There is no shortage of quality operating systems out there. Between Ubuntu 14.04, Chrome OS, Windows 8.1 Update and OS X, you can't make a bad choice. Most modern operating systems are pretty great. Personally, I utilize all of the previously mentioned OSes on a regular basis. However, I have been spending most of my time between Windows and OS X.

No, I don't own a Mac, but I did build a Hackintosh. This is just a normal PC that runs Apple's OS. This allows me to get great performance and customize my machine, while still enjoying the benefits of OS X. Today, after a period of open beta-testing, the final version of Mavericks 10.9.3 is gifted to existing Mavericks users. Is it worth the upgrade?

Apple iPhone owners have a new lock screen bypass to combat after a security researcher discovered a flaw in the newest version of iOS.

It’s reported that the latest exploit, which is inside iOS 7.1.1, allows someone to reach the iPhone’s Contacts screen without unlocking the device and works across all iPhones that have the Siri personal assistant.