When you buy a new gadget, you may be excited to try it out. That is until you read the manual and found that the manufacturer is giving very complicated instruction. Here are 10 tech things that surely will give you a headache as cited by T3.

Hitting the Insert Key

You have spent all night editing your thesis and you were half-way done with it. Then you realized you have accidentally hit the Insert Key. Can someone please justify what that key is for?

Self-Checkout

For those who are not familiar, Self Checkout or Semi Attended Customer Activated Terminal is a machine built to replace human cashiers in a grocery store. Neat, right? That is until you found that your purchases have no barcodes. Just when you needed human assistance, they are out of sight.

Fitness Gadgets

You have downloaded all the fitness and weight-watching apps on your iPhone. But, for some reason, your shirt seemed to have gotten smaller. Or, was it you who had gotten bigger? Whatever happened to all those "Nikefuels."

Submitting Online Forms

Filling out online forms can be a massive headache. Sometimes, the "Enter," "Submit," or "Send" buttons do not work. You just find this out after you have filled the whole thing out.

Losing A Charging Cable

When you needed your DSLR's battery fully charged, you find that its charging cable was missing. How are you supposed to get a gorgeous picture of your trip to the mountains now?

Updating An Operating System

For some reason (or you just didn't partition your drive), your photos, videos and documents were all deleted after updating your OS. Then you realized that you did not have a back up of those files.

Using 3G For Something Important

You had forgotten to finish an important report because you were excited for the holidays. You use your iPhone, iPad or Android phone to finish an important homework. You are 5 minutes away from the deadline. You press Send only to find out that you had lost connection. There goes your 5 minutes.

Satellite Navigation Crashes

You had religiously followed sat nav's instructions. But you keep ending up on the same street which is no way near your destination. Well, you could always pretend it's comfortable to sleep in your car.

Putting Cleaning Gadgets Away

Your vacuum might seem innocent. But it will fight back the moment you force it back to its cupboard.

Kitchen Tech Overload

You went to the kitchen to practice your cooking skill. There you found that kitchen counter was already invaded by your "health grill," four-slice toaster, state-of-the-art coffee machine and an electronic juicer that it was virtually impossible for you to work on it.