Deleting PC data is not a simple exercise to make space on the hard disk. Whether we want to sell, return or give away a computer, or simply for security reasons, we must bear in mind that by dragging a file to the recycle garbage can and pressing empty we are not deleting anything.
Look at the graph above. When we execute a deletion, we write zeros over ones. But where there was data there is always a residual magnetism, which can be read by specialized equipment.
Depending on the intensity of that wave, it is possible to deduce the content that was there in the past. Hence, the more rewrites and readings on the same sector, the more difficult it is to recover the information: it is buried, literally crushed on the new data.
I am sure you have heard of a certain compromised computer that was formatted 35 times. It refers to outdated methods, since more modern erasure protocols have already been introduced. Specifically, the Gutmann Method. In 1996, computer scientists Peter Gutmann and Colin Plumb presented a virtually foolproof data erasure method.
How to remove static from a computer
Every computer has a preconfigured BIOS in the hardware. It is different from an operating system, as they can be installed, uninstalled and updated long after the computer has been purchased. The BIOS, on the other hand, is integrated into the computer at the time of manufacture.
Everything your computer does can be reduced to inputs and outputs. The BIOS has the function of managing the exchange of inputs and outputs of your computer, especially when you turn it on. So, the BIOS tells your computer how to boot the operating system and operates the peripheral devices (such as the mouse and keyboard) .
Let’s say you press the power button to turn on your laptop, how does the computer process that command if it is turned off? That’s what the BIOS is for, which performs the basic functions of your laptop while it’s still half awake. Pressing the power button is basic input and booting your operating system is basic output.
How to dispose of a computer without polluting
With the passage of time, there comes a time when we must dispose of an object, piece of furniture, appliance or electronic device. But changing your washing machine is not the same as throwing away your PC. In the second case, you can leave a trace of your life.
You don’t have to be paranoid to become aware of the importance of cleaning an electronic device, whether it’s a smartphone, tablet or computer. I don’t mean wiping the screen or dusting the keyboard, but erasing personal data or files we have left behind.
Hence, if you want to sell, lend or throw away your PC, you should spend a few minutes beforehand. Let’s see how much we can do at the level of the content we keep on the computer before giving it another life.
In any case, once the content has been uploaded to the cloud or copied to a physical storage device, we must delete it from our computer. In the first case, we must first close or uninstall the synchronization client. And in both cases, it is not enough to send the content to the Trash. Do not forget to empty it.
How to reset a laptop that won’t turn on
The best way to ensure that your company’s data is secure is to have reliable security practices in place. With 85 percent of employees admitting that they took company documents and information, there is clearly a need to monitor employees. While every company may not have a policy in place, it’s never too late to reassess and increase your cybersecurity.
It’s always a big shock these days if you hit the power button on your computer and? nothing happens. Since one of the most common home solutions to computer problems is to reboot your computer, if you can’t even turn it on in the first place, there seems little hope for recovery! However, it’s not always a totally lost cause, and even when the computer won’t turn on, a reliable computer repair service like ours can usually step in to save the day. Before you bring your device to us, however, here are a few things to look into.